I won't ever call any of them stupid or anything along those lines. I think they really have a misunderstanding of things and it's not their fault.
Part of the problem, I think, is that things are so easy that anybody can post something on the internet and claim to be an authority on it. Some people find these things and don't know any better that they are unable to understand the difference or question it.
I've seen a lot of flat earth "proof" and a lot of them start with, "I was watching youtube one night..."
Many more are the same handful of things repeated over and over like the whole "water seeks its level", spinning a wet ball, and horizon things. It just shows, to me, a lack of understanding or the fact that they just can't fathom how big everything is and how small we are in comparison.
There are others who can't imagine not having some sort of deity watching over them who created this just for us. And that's ok too.
For me, I take more comfort in the fact that us here on this planet could just be a long line of cosmic luck. That makes life more precious to me when I think of it in that perspective. I want to enjoy every moment as if I am here as just some sort of huge accident.
Then again...here I am wasting that time on the internet 😆