I think most would agree that there's a significant difference between a physical product that shortens the lifespan of virtually all humans who use it, and looking at images and video, no matter how extreme.
> And parents aren’t in control of children 24/7. Schools tend to provide tablets and laptops everywhere, and how much trust should parents have that things like a content filter are adequate to keep children from asking objectionable pornography, hate sites teaching misogyny and so forth?
Agreed.
Parents and guardians should definitely be aware of and concerned about what internet filters are in place at schools.
Neither of the words you used give parents any control over the situation. Legislation is the circumspect way parents are exerting control over websites that are unable to police themselves.
Schools have traditionally been ground zero for culture war in the USA, so this fits.