Before anyone gets on the wrong track, I don't think that his video should've been demonetized. I think every company should be allowed to stick their ads where they want to. But artificially promoting sensitive content is as problematic.
How is this sensitive content?
It's a discussion about an interesting and relevant subject which we should actually see a lot more of on social media. It's important to discuss issues rather than blocking or demonetizing them because certain people don't like their views being questioned or people to have a different opinion to the current acceptable narrative.
I definitely agree with you, we need a lot more content of this and a lot of multi-sited scientific discussions of people of all different sites to find a middle ground everyone can live with. But, since this is a "one sided" video which doesn't involve a lot of neutral discussion with the opposite side it should neither be demonetized nor artificially promoted.
To answer your question about "sensitive content", it is sensitive content since a lot of people have a different opinion on it. Promoting this kind of content artificially (featuring it for everyone on the front page) shows a bias of the company and influences people. (Similarly as demonetizing and banning does too).