The reason our Lord challenged us to “not judge” was not because it makes sense to us or that it doesn’t meet our fancy.
It’s because it goes against all of our senses, the senses that we must mortify in order to die to our desires and passions, including the desire to “fraternally correct” our brothers to the point where any given conversation between sinner and “fraternal corrector” clearly shows that they are both blind to how their own emotions and passions to be right and to “be right about sin in others” as a Good Catholic. And we do this in the name of He who told us JUST DON’T.
He challenged us because NOBODY WILL EVEN TRY taking Him at His word. Even in the enlightened age of the 21st century, we refuse to even contemplate for a MOMENT, that MAYBE our Lord had something going for Him other than, “guys be careful when you judge because I need you to do that for me because I’m not capable of handling it Myself. K. Thanks.”
Now I challenge anybody who is put off by this, to take a deep breath, and calm down for a few minutes, and then try. Just try to imagine a world when it’s Not Your Job to tell everyone else of their faults. That’s all the Savior was asking us to do, not to become blithering idiots for our inability to deal with each others’ sinful nature. The Truth in things like this can only be found through obedience, not scholarly debate about whether God’s ideas are worth considering before we pollute them with our sinful Better Minds about how Christian life should go down than the one whose example we are ostensibly following.
Fraternal correction is a spiritual work of mercy. If you correct a grave sin you could save that person from being obstinate and potentially prevent them from being damned
15 - Beware of false prophets, who come to you in the clothing of sheep, but inwardly they are ravening wolves.
16 - By their fruits you shall know them. Do men gather grapes of thorns, or figs of thistles?
17 - Even so every good tree bringeth forth good fruit, and the evil tree bringeth forth evil fruit.
18 - A good tree cannot bring forth evil fruit, neither can an evil tree bring forth good fruit.
19 - Every tree that bringeth not forth good fruit, shall be cut down, and shall be cast into the fire.
20 - Wherefore by their fruits you shall know them.
21 - Not every one that saith to me, Lord, Lord, shall enter into the kingdom of heaven: but he that doth the will of my Father who is in heaven, he shall enter into the kingdom of heaven.
22 - Many will say to me in that day: Lord, Lord, have not we prophesied in thy name, and cast out devils in thy name, and done many miracles in thy name?
23 - And then will I profess unto them, I never knew you: depart from me, you that work iniquity.
We are supposed to judge false prophets, I guess.