I think the whole Flat-Earth resurgence was a good thing. Why?

It inspired a new generation of people to be curious, look into things they had taken for granted and learn to do basic research & fact-checking.

It was great mental exercise to listen to the claims, consider that maybe they are true, and then work to disprove them.

I spent hours watching videos, thinking and reading about physics, geology & astronomy because of it.

Another good one is the Moon-Landings. Real or not?