Hm, you're right, I'd agree that access can be more controlled and filtered today than before. But how many websites/parents/devices actually enforce it?
And also, what I was trying to get at is that the total amount of (addictive) content on the Internet and the amount of time people, including kids, spend on the Internet has exploded. Sure, millennials could do whatever online, but there just wasn't that much to do and you would still spend the bulk of your day offline. Now we can (and do) spend basically all day on the Internet. Seeing something bad once is whatever, but seeing it constantly... IDK