You mean to say Flat Earthers would draw conclusions based in a fallacy of equivocation? That they could actually be stupid enough to think that belief in the Earth as a globe and globalism have something essentially in common because of an accidental use of a word?
Indeed they would, they could and they are!
I don’t think Flat Earthers are stupid because of their belief; even if the Earth turned out to be flat, I would still think they are by-and-large literal morons because of the MANNER in which they have presented themselves in arguing for that belief.
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They're not stupid, but they're tired of not having any snappy comeback when they're called stuff like flat-tards, flatulents and flat-liners. When their hypothesis falls flat, their flavor is flat and their ratings are flat. They're scraping the flat bottom-of-the-barrel for whatever they can find, and it isn't much, so they run with it, but they're flat out of luck, flatly speaking.
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One might think they're running scared, but the only thing they have to phear is'phere itself.