So is redemption not possible?
Yes, redemption is possible, and we pray for it. In the pews, not necessarily leadership. The Catholic Church provided an example of what NOT to do.
Read 1st Timothy Chapter 3
more so verse 10
[10] And let these also first be proved: and so let them minister, having no crime.
Of course redemption is possible - but does that make one suitable to preach?
I realize Paul seems to be a glaring hole in that argument but they also gave qualities for those put in teaching positions - like solid family men who kept their own household in line.
Being allowed into Heaven and being a teacher of the Word and being held as an example are different things.