The problems are the tracking and the ad networks that kinda treat both the viewer and their site-hosts as consumable resources, but that sites can't realistically avoid if they want/need ad support, because that's where all the money is. Break the ad networks, break tracking (and I mean legally, in both cases—tech means for blocking are doomed, IMO) and ad money won't go away, it'll be redirected to less-awful ways of delivering ads.
However I don't want any content which could be distracting or plain unsafe for mental wellbeing. One example are the ads for violent games on BlueStacks when I was using the emulator for Android education software for my children.
No thank you. Any content I can't control will be kicked.
Either by using adblockers or by just not using the service.
I dated a woman who experienced trauma in the past and she would routinely get horror movie trailers in YouTube. Even I found them disturbing. Neither of us had any interest in getting intrusive thoughts from watching assault and body horror. Putting in uBlock Origin did wonders for her well being.
I think there's actually a great opportunity for someone to create an ad server that only serves first-party ads with no tracking.
I'm talking about something even simpler than that. I have my own website and I have my own advertisers who want to put ads on it. I need a way to serve them and do contextual targeting (e.g. stories about a certain topic) and frequency capping and forecasting and the other sort of basic stuff I expect from Google Ad Manager.