In every single discussion that I have been in about flat earthers, the people who took them seriously constantly exhibited stupidity. Flat earthers are all about how people with borrowed knowledge have delusions of sophistication. They are the caveman who has been given a stainless steel knife. Almost immediately, that caveman will start having delusions of sophistication because he will imagine that other cavemen don't understand metal the way that he does.
We do not inherit the world from our parents. We borrow it from our children.