If FEers really believed it, it must hurt when a geocentrist doesn't buy into FE. But I don't think most FEers really believe it. Some, sure (I think happenby might), but most seem to me either doing it as a mental challenge or debate exercise, or are trolls of some form.
.
After watching a number of YouTube videos and reading the comments under them, it has become obvious to me that a large portion of flat-earthers, perhaps a majority, are merely pretending to think the earth is "flat" because it's a fun game they're playing, by posting inane, cryptic or even deceptive messages online, just to see what reactions they'll get.
.
They seem to take it as an achievement to post a word or two, maybe a three or four word phrase, but no more than two very short sentences, after which that one post evokes 20 or 30 or more replies most of which are many times longer. They seem to interpret this as having power. It's a kind of blasting cap mentality. One small spark ignites a conflagration. It's just entertainment, at the expense of others who mistakenly take them seriously. There have been a few of them here on CI but they eventually get banned for heresy. Heretics tend to be impressed with a false sense of power or self-importance.