Parents who are unable to give their kids the tools they need to avoid getting shunted into special education on account of their behavior are in no position to supervise their online activity.
I make a habit of looking up kids parents on FB - it generally tracks that the worse the kids behavior and educational outlook, the greater the parent’s (singular in most cases) social media presence. I’m no longer surprised when I find a mother’s Onlyfans link, FFS.
Where I live a full 1/3 of 1st graders are in a special education track. All the research points to the impact of the home and family on these outcomes.
Tl;dr many parents are incapable of the rational parenting you suggest.