Aside from the fact that maps like airman and freedom dive are legitimately very difficult when it comes to FCing, there is indeed a big psychological aspect to it, not even in terms of patterns or whatever but just because the maps are so iconic and the number of people who have FCs on them is almost zero.
i.e When Cptnxn set his freedom dive FC, he paused on the last break to read the chat and said something along the lines of "I mean, it's Freedom Dive, I'm just getting nervous as fuck."
He could probably make a custom diff with the spaced streams at the end and ace them repeatedly, it was clearly within his ability to do so, but with the potential to make osu HISTORY, to set a score that perhaps no one will ever beat, that everyone will care about and know and herald you for, the stress is so much higher than a normal FC, or even a normal rank 1 on a typical map.
It's becoming less relevant with airman though i predict at least 2-3 more FC's before the years end, but big black is another good example of a map with huge psychological impact, there would probably be 10+ FCs by now if it didn't have such a powerful stigma.
Then again, I also think that playing a map THOUSANDS of times affords no advantages whatsoever when it comes to FCing it or not.
in fact, it probably just makes the stress of FCing it higher [omg after 3482 tries im gonna do it!] and possibly cements any sort of bad muscle memory however slight and hard to detect and fix it might be.