Do flat earthers actually believe their stated beliefs? Or are they just having a laugh at taking up space in our heads?

[LSLGuy]

Previous threads on topic:
Feb 2024:

Are Most Flat Earthers Trolls?

I have been getting lots of flat earth posts in my FB feed lately. It is all so crazy. I know a few people believe it, but is it mostly trolling like the Birds Aren’t Real folks? If not, god help us

Apr 2020:

Thoughts While In Quarantine - WRT The Flat Earthers

Sitting and chatting with my daughter got me to thinking, do you all think that the Flat Earth people are truly earnest in what they are spouting, or rather that it is somewhat akin to “belief” in The Flying Spaghetti Monster? I want to believe it is the latter, but my daughter insists they are nutso and truly believe the planet to be a disk over a sphere. I just do not understand how people who can, presumably, dress and feed themselves without assistance can swallow such a large fallacy.