You're right that enforcing boundaries is the job. I'm not arguing otherwise. And yes, we do plenty of LEGOs and outside time.

I believe you're conflating two things: parenting discipline and product design. The question isn't whether I can physically take the TV away. I do.

When I say "block Blippi," I don't mean I dislike the content. I mean I'm done with screen time and the UX makes that transition harder than it needs to be. Autoplay is off, but the end-of-episode screen still shows a grid of next videos. Of course he wants the next one.

So I block Blippi. Except Blippi's main channel cross-posts through Moonbug into hundreds of other channels. It's a hydra

YouTube already does content fingerprinting for music industry DRM. The technology to let a parent say "block this creator everywhere, and let me turn it back on when I choose" exists today. They just haven't built it for parents. Because the system isn't designed for children. It's designed for engagement.

So yes, parental responsibility matters. But "just don't use it" isn't a scalable answer when the product is specifically engineered to undermine your choices. That's the design problem I'm talking about.