Great, so you pretty much only host established creators. Nearly all big channels on Youtube started with what is now considered shitty contend. They trained their editing skills over time, bought proper equipment once they really got into it and probably only found their style halfway through their "career". If YouTube pre-filtered it's videos, then the site would be dead by now.

Sure you can shove all responsibility to someone else and say they should self host it, but then you also have to acknowledge that peertube and the like eliminate 98% of all content before its made with its cobsiderably higher entry point, and that includes the good and the bad.