In this context "politics" clearly conveys "things directly related to governments, such as wars, elections, or socio-economical ideologies". It is only a subset of the definition of politics that you're probably using, something like "things direct or indirectly related to human groups and their conflicts of interest".

We got a whole Lemmy to talk about Israel vs. Hamas, late stage capitalism, elections etc. We could - and should - have at least one community to chill and talk about other stuff, and without that rule we won't have it. For example without that rule 99.99999% of the content as of late 2024 would be about Trump, as if Americans didn't have multiple communities to talk about it already.