This article gets close to the heart of flat-earthism, bad sadly doesn't quite take the plunge over the edge. The origin of flat-eartherism is people like this author, and his wife's need to convince others that they are wrong in their beliefs and get them in line with the correct beliefs. It's hard to remember at this point, but think back to about 15 years ago, the idea of a flat-earth was held up as the shining example of how clueless people in the past used to be and how far we've come. That story was fake by the way, people have known the earth was round since ancient Greece, in fact they even had a pretty accurate measure of the earth's circumference. In between there were surely less knowledgeable groups of people, but it's hard to find any concrete cases of large scale belief that the earth was flat, rather than people not really understanding what was meant by "the earth" on a planetary scale, vs. their local perception of the earth around them which did indeed appear to be fairly flat. Except for today of course, where each passing year we hit a new watermark of belief in a flat-earth. How did we get here? Like I said, articles like this give you a good insight into that path, when you're constantly barraged with articles whose entire point is to define a group of people and call them dumb it repels people, and some small number of people get caught up in that repelling force, they start to wonder if maybe this barrage of meanness is actually hiding some deeper truth. Over time these people form into their own group and settle into a symbiotic relationship with the first group. As the group gains steam there's more and more evidence that people are dumb, and need to be called out as such, giving the author of this article and others more ammo, which in turn repels more people into joining the group. And around, and around they go, where it stops I have no idea.

Edit: I should add, this article is among the most civil and charitable articles of its type. I don't mean to pick on this author in particular.