I went to psychologists for several reasons since 2013, that was 10 years before my diagnosis. And all of them had weekly sessions, because according to them, the more close in time those sessions are, the better those results are for the patient.
I had to leave a Mastodon instance because it was about activism, gaza and politics the whole fucking day. So I perfectly understand what you feel. But I think there are ways and/or servers where everybody can feel comfortable. The mastodon server where I'm on right now, people talks about US stuff the whole day, and I'm very annoyed because of that because I don't give a damn shit about US. But the admin is cool, people support Ukraine, and I follow funny stuff too.
I would agree with you if those communities were/are created to post content about gaza / war / techbro. But in most cases, those communities are generic, about news and technology, so when you block them, you also block other content that is not about gaza / war / techbro.