“Nerdy left wing” is already highly specific, when your realise how nerdy and how left-wing we’re talking. IRL “left-wing” means you’d prefer Bernie Sanders over Trump, head-to-head, and “nerdy” means you really liked Star Wars. It’s a bit too extreme to say we’re all communists who have a strong opinion about the Linux systemd controversy, but it’s closer.

That can translate to similarity in non-obvious ways, as well. I just had a thread where, among other things, I talked about how helium is an endangered element, the way we’re using it on Earth. It got upvoted; IRL people are just dazed.