So it is a "Do what we say, not what we do" sort of thing, combined with a papal "Daddy is always right".
That doesn't work on children, why would one suppose it would work on grown adults, especially when "daddy" ain't my daddy?
The Church is inerrant in the same sense the Scripture is inerrant: on matters of faith and morals definitively proclaimed. There has never been a claim of inerrancy or infallibility in any wider sense. The Visible Catholic Church is made up by fallible men who make errors of judgement all the time.
It does work on children: with few exceptions children are raised by fathers who make a mistake or two in their lives, yet there are many fathers who know what to teach their children and indeed teach the right things.