This is a complex issue but I'm inclined to agree with you. Giving Facebook/Youtube the responsibility to censor content feels dangerous with the amount of influence they have.

I know it's the "think of the children" thing, but I hope Youtube sees the outrage about these spammy kids channels and does something so they aren't suggested and autoplayed. To me that's a special case. Grown adults who see fake news on Facebook and take it as the truth regularly.. Is that really on Facebook to fix that?