There's is a hidden "not interested" button on mobile where you can then say why you don't want to watch a video and choose to block the channel or similar videos.

The algorithm isn't ideal, but after a couple days of filtering you can pretty consistently get a feed of videos you're interested in.

The idea of people getting persuaded by fake news, etc. is a topic for another day. This assumes you can vet trustworthy sources on your own.