Hi, Bluegoat,
Admittedly, all analogies limp … but, I think the amoeba analogy is bedfast!

Let me explain…
When the amoeba divides, it is genetically identical to its ‘parent’. Protestants ‘divided’ or separated and totally left the ‘parent’ - and, that Parent is Christ and the Church He founded that provides the Grace of the Sacraments. There is Life and there is the appearance of life. Appearances can be deceiving.
Please note that in the 500 years of Protestantism we see the ‘development’ of certain doctrines like practicing homosexual clergy and bishops, endorsing ‘same-sex marriage’ and other-wise approving of homosexual behavior. While this homosexual behavior is specifically and repeatedly condemned in boththe OT and NT - we are witnessing ‘developments’ that simply abrogate the Word of God!

Now, from statements made by the founders of the Protestant Revolt - homosexual behavior was not approved by them at all. This apparent approval by the various churches has caused serious discord and division amongst the members - and schism has resulted.
Not all change is beneficial - in fact, some (as in the cases mentioned above) are quite harmful.
But, we really can not stop there, can we…

In Matt 16, Christ not only founded His Chruch on Peter but gave him the authority to bind and lose and the keys to the kingdom to identify that it was Peter who was in charge per Christ’s orders. Christ also said that He would have the Holy Spirit guide His Church and we would not be left orphans.
Note: that Christ’s Church - ever since the Council of Jerusalem (Acts 15 in about 50AD) has been making decisions - not specifically identified by Christ! We know Christ was circucized on the 8th day, and the assumption is that His Twelve Apostles (all being Jews) were also circumcised. They also were required to follow the Law of Moses. Look what happens, 17 years after Christ ascended into heaven, it is decided that neither circumcision or following the Law of Moses is necessary to be a follower of Christ! Considering all the history behind these OT requirements, this is really a major break from the past. It is also one of many that came from the various Chruch Councils.
Please see that this is quite different from an angry monk taking matters into his own hands and nailing his 95-theses on the chruch door. That is heresy and apostacy in action.
God bless