I avoided the flat earth argument like a plague, but when I finally relented it made perfect sense. A very easy conversion. Actually, it was a relief to accept that God's word about the earth was true, and the "world" so to speak, was telling a monumental lie, as usual. "Let all men be liars, let God's word be true'.
I don't see why anyone would think flat earth is only in the realm of protestants when there is so much information that corroborates the Faith.