You describe a use case for you. That's fine.

Here we talk about use cases for EVERYONE. I don't see how your use case is fine for me, because I personally do not agree with it on any level at all whatsoever. You believe in restriction. I don't. There is no common ground here.

> It's not realistic for me to be watching over their shoulders 24/7

Is this your job? At which age will you stop monitoring them?

> what can I do to keep them away from stuff 99% of people agree isn't for children to see

99%? Where do you get those numbers from?

Besides, what stuff anyway? Even then the issue isn't about your kids. It is about laws for EVERYONE.