I know that this is most likely bait, but it’s fun to address this topic.

The problem is the base of the arguments. Often flat earth theories disregard theories we see as proven, based on empirical evidence, and form their own theories, which have flaws that people “globers” see as authorities in the field (e.g. scientists, scholars) can point out in a reasonable manner. However, these flaws are often disregarded due to paranoia, claiming these people are also part of the conspiracy, or are brainwashed by it.

This leads to a disjointed thinking process. One side cannot think like the other due to different bases in logic, so any classic arguments are fruitless to convince the other. Hostility ensues due to frustration.

It’s similar to people who suffer from psychosis. There is no point in arguing traditionally, and the only way to help them is through processes like the LEAP method, in order to help them connect to a more grounded reality, if that is even possible.