Sometimes people aren’t always trying to convince people to leave cults, and are instead just trying to describe and discuss aspects of reality, like religions

And they're free to do that, but it doesn't have anything to do with with improving conditions for anyone or deprogramming cultists, so to assert that everyone should spend their time on it is ridiculous, as it amounts to a hobby.

People should care about reality, reality involves religious people driving how that reality progresses

People have a limited amount of time in their lives to spend. Learning about a religion, or how it ties into real history, should be done as a hobby by those interested or when it is pragmatic to do so. Arguing with zealots about how their cult ties into history is a pointless endeavor that is really playing their game, and therefore not pragmatic.

If you disagree with that, you don’t actually care about truth, you are an anti-intellectual.

Now you're just being unserious.

Ideas must be considered, explored, examanined, discussed, in order to determine their truth or falsity.

Not all ideas are equal. If someone says we should genocide an ethnic group, the correct response is to recoil in horror and condemn the idea. When someone makes supernatural claims from their religious cult, the correct response is to make arguments that have at least some chance for a spark of deconversion - not to engage them in a rousing conversation about minutia that will NEVER have any positive impact.