It's a scapegoat. If you want people to stop looking up content about distrusting the government, the solution is a more transparent government, not to stop them from watching the content.
This rabbit hole encourages extremism in some people, and that can be harmful to society. Why the defeatist attitude, that huge companies have to encourage extremism or people will stop using their products? That's non-sensical
The other thing is that we really don't have shared definition or word-feel for "extremism". The people who are the most vocal about curbing extremist content also happen to be wildly partisan. I don't think that is a coincidence. I sense the false-positive rate is extremely high in this regard.
It is also unclear to me that the recommendations ought to be moderated by some embedded state entity to make sure the results align with what is in political vogue.