Weirdly enough, I was just thinking about papal infallibility, because I checked the news this morning and saw that the Mormon prophet, Russell Nelson, has died at 101. There's an old LDS joke which isn't correct about Catholic doctrine but is still funny - that Catholics believe the Pope is infallible but nobody acts like it, while Mormons believe the Prophet is fallible but nobody acts like it.
That bit of Mormon doctrine goes right back to Joseph Smith, who taught, don't take my word for anything, pray to God and ask for confirmation that I'm right.
But the second half of the joke works perfectly. Sometimes I look at the LDS subreddits, and when the conversation comes around to Brigham Young's theological innovations, almost all of which are disavowed by church leadership, you still can't find anyone who will admit that Brigham was wrong. The standard answer is that he was inspired in his time, and the current leaders have got improved inspiration.
It seems that a top-down leadership style (and the late Russell Nelson was a surgeon before he was a church leader, so he was definitely top-down in his style) and a conformist culture beats formal doctrine any time.
I have theories about conformism in Irish culture. As we know, it hasn't gone away with the collapse of Catholicism, it's just taken a different form.