Welcome! There are some entertainment, art, and culture subs but as you said they are much less active than political ones. I post some stuff to /s/music , and would like to get some of the other subs more populated, such as the gaming / books ones. I think one of the main reasons is that controversial / political stuff is being censored from the tech monopoly social networks, so people come to post it here instead.

I have many friends on the political spectrum (I try more and more to avoid using labels such as "right" and "left") and have many great discussions with them. We need all sorts of opinions so this place doesn't become an echo chamber. While it does seem to lean more libertarian, there are many different viewpoints here which I like. Anyhow, again welcome and hope you enjoy your stay here!