Its a faith position, not a scientific one.
They talk about evidence, but when people (e.g. wolfi6020 on youtube) challenged them to go out and look at the sun rising directly east and setting directly west on the equinox (an easy thing for anyone to measure which would never occur on a flat earth) zero flerfers actually did the experiment.
Faith positions are difficult to shake. When I was religious I knew there was a host of phenomena and moral questions that were difficult to explain or justify in a universe with a good god. But I always assumed that there were brilliant answers out there that I just hadn’t heard yet.
Then I looked for myself 🙂
Another explanation is honestly rank ignorance and stupidity. I’ve heard someone opine on the “failures of the globe earth model” and the fact that “gravity doesn’t exist” in one breath and then be unable to tell someone what the angles are in a triangle with three equal sides in the next.
We’re probably not losing the cure for cancer here.