Tumblr has plenty of discussion about hobbies, TV shows, anime, video games, etc. If you like a certain thing, tumblr is a great way to be exposed to people discussing it, making text jokes about it, making fanart about it, etc. That has been literally unaffected by the NSFW ban in the many fandoms I follow on it.

There are people like you describe, but it doesn't dominate the platform imo. It's easy enough to get a lot out of tumblr.