It is wrong to say Protestants do not believe or try to practice holiness. Take the Reformed faith for example…
My friend, it is not quite so “black and white” as me being “wrong”. My characterization is a mean average of “what” the fuzzy world of Protestantism is. I accept that what I have stated is not a perfect characterization of all Protestants - after all some of you all still cling to Catholic concepts - including the necessity of being Holy.
“Protestantism” et-al is a tumbleweed of conflicted and contradictory belief systems. Catholics usually adapt a Lutheran view of Protestantism in the general dialog since it is what caused the whole Protestant mess we have today.
To your point - let’s be pragmatic. We can’t by any means call Calvinism or the so called “Reformed Faith” the representative standard for Protestantism since this small cloistered sect of Protestantism accounts for only a trivial 11% world wide Protestants. I doubt that even half of these even know what their “orthodox” belief really is (BTW which Westminster confession version? Church of England, Savoy, or Baptist etc. etc. …?). So “by the numbers” Calvinistic belief with its dark and fatal attractive appeal to those few who imagine themselves to be destined to “the elect” (just like JWs) are hardly mainstream Protestants today - perhaps 300 years ago. The word “holiness” in the Calvin system might just a well be synonym for “rare” or as nearly “extinct”.
From my perspective the more predominant unifying aspect of Protestantism is not even characterized by theological categories. Rather I see it best characterized on a category of secular social behavior. That is, the Protestant “protest” against authority (ecclesial or civil) has become in the religious sector itself a self-evident expression of faith in man’s religious conviction of our own sinful nature. A legion of dogmatic choices that any sane person knows can’t all be simultaneous right becomes the Protestant Tower of Babel - a cacophony of depraved sinners attesting that they can do no good as mankind is seriously conflicted. Hmm, what genius managed to remain so holy and so perfect that he could put a “reformed” blueprint together?

Franky, if not for a certain depraved ability to imperfectly subscribe to a generally accepted “Christian moral code” what really differentiates a Protestant’s faith from the same faith that heathens have that they are just as free to do as they please since they are in God’s eyes just as"equally" depraved as anyone else (some maybe even being unaware that they members of that elite group called “the elect”).
Note that within Calvinistic systems only the few destined “elect” are able to escape the mire of Total Depravity by God’s irresistible grace to become Holy. Is this not just a cop-out formula that sheds all personal responsibility and makes it ALL God’s job to save the few He might want? Calvin renders “free will” as an anomaly of “the ego” - and then goes conspicuously mute in accounting for how his neo-Christian system managed to evade the the same corrupting influence of “vulgar man” in developing a “reformed” theology.
Is the Westminster Confession (version 3) a new divinely inspired work of God or just a new ego-centric expression of vain man attempting to forensically declare himself able to infallibly define a system that can at least recognize Holiness if ever one sees it in himself?
The whole Calvinist system of thinking is irrational and self contradictory. Shall we say that Mr. Calvin was still in a fledgling “regenerative” phase when he murdered his arch-nemesis Michael Servetus and burned him alive at the stake?

Or was this one of Calvin’s stubborn Catholic proclivities for works that he was letting God exorcise from his corpus as he gave us his new formulas for Christianity and “bet on the come” that he was one of the elect?

Fancy that, a system of “reformed” holiness that can produce real tears of repentance through empathy for those who we demonize and burn at the stake and send to hell in our place; or is it a holy repentance through the tears of despair that we might not be fated to be "the elect? I can hear it now “Please pick me Lord - just one more for heaven Lord”?
Sorry, even if Calvinistic systems properly recognize that holiness is a necessity for salvation I just can’t embrace such self evident hypocrisy that is in it’s practice as orthogonal to truth and actual attainment of objective as are the cross-beams of the crucifix to stretching “The Truth” on the cross to change Christ’s words from “My Church” to “My Churches”.
Oh dear me, I know you are trying to be sincere here. But you Calvinists are the brighter of the bunch and are not too far removed from Catholic belief. You really need to come back to “The Way” - its The Catholic Church that Christ established:
Matthew 16:18
I also say to you that you are Peter, and upon this rock I will build
My church; and the gates of Hades will not overpower
it.
Note there is NO plurality in this verse. It is CHURCH singular.
Acts 9:1-4
Now Saul, still breathing threats and murder against the
disciples of the Lord, went to the high priest, 2 and asked for letters from him to the synagogues at Damascus, so that if he found any belonging to
the Way, both men and women, he might bring them bound to Jerusalem. 3 As he was traveling, it happened that he was approaching Damascus, and suddenly a light from heaven flashed around him; 4 and he fell to the ground and heard a voice saying to him, “Saul, Saul, why are you persecuting
Me?”
John 14:6
Jesus said to him, "I am
the way, and the truth, and the life; no one comes to the Father but through** Me**.
JESUS is HIMSELF
THE WAY through His Body- which is HIS RELIGION AND HIS FAITH AND HIS CHURCH.*
James