Well, the client can be politically active

I mean let's say the client focuses on one issues, goes to protests and marches, wears political buttons on his backpack... so of course this would come in therapy in some way. For example the client complains they feel burned out, that nobody really listens, that it feels in vain, that they often get yelled at and accused of things...

the therapist should handle it in a good way. Which might be hard if it's an issue they disagree with and could create tensions if the therapist expressed it ("you are really wasting your time, you are wrong....").