When it comes to content that is illegal specifically - that of course, should fall on tech companies to moderate. But that is the exception, in my view.
In short, your child's oversight is not one-size-fits-all - it is strictly your business, and perhaps your school's and childcare professionals'.
Because you're the parent?
Yeah you can't monitor 100% of the time but like.. moderating your child's experiences is kind of part of the job isn't it?
Edit: I'm not saying the tech companies have no responsibility at all here, but surely the parent is the final responsibility in these matters?
When I was a kid if I went over to a kid's house and their parents let us watch R rated movies or whatever, if my parents didn't like that they would talk to the parents. If that didn't change, I wasn't allowed to go over there anymore
Why not the same with YouTube? If YouTube won't change, isn't it your responsibility to remove access?
Is the subtext here "don't have children if you can't do the job"?
If it is, then it's valid to discuss the difficulty of predicting what exactly the job of parent involves when it can drastically change due to technology and social norms over the interval of 5-10-15 years between making the decision and executing the role.
This isn't a blanket statement to abdicate responsibility, nor a blank check for unlimited responsibility, but certain unanticipated challenges are expected and some grace must be given in light of a dynamic environment.
Responsibility is an abstract concept that we operationalize in order to make judgements and decisions. Like any operationalization problem, how can you be transparent around its construction?
