Who posts the reviews matters, ditto for youtubes. You want to do away with ratings ala ESRB, that's clear.
You assume that what's out there is fine now, because you say so? Well that's just not good enough. Especially since more games will come and go, with lightning speed, and the technology will evolve faster than any parent (or librarian) will be able to manage. Surely you noticed that the AAP says they have to define a "new normal" almost constantly? Or don't you think pediatricians really care about kids.....
People do need a more reliable way to get an idea of what they're buying/giving. It needs to be something any player, parent, grandparent, teacher, friend or relative will find consistent and helpful. We don't have that now. And you damn well know it. Dodge that.