That said, just because a word has been reclaimed by its group doesn't mean that it can't still be used as a pejorative or that it's always okay to say. Context and intent always matter.
Basically, it's like how black people as the intended recipients of the n-word can reclaim and use it, but no other people can use it. Same thing here, only LGBT people can reclaim it. That said, uses of it like "queer visibility/ representation" when discussing the tropes or lack of characters in media? That's one of those "everybody can use it in that context" type of deals.