Protection of children on the internet should never be one-sided. It shouldn't be the services protecting children only.

And while I agree that the issue with Roblox is systemic (as in, the whole company doesn't give a flying fuck about kids being groomed as long as the groomer paedos are buying Robux in large enough quantities), and they should be doing more, what really needs to change is parents' attitude.

Because let's be honest, most parents are just like Roblox, they don't give a flying fuck about what their kids do on the internet as long as they get their 15-20 minutes of uninterrupted me-time.

And it's not even directly the parents' fault, I'd argue, because most parents today simply don't have the knowledge and capacity to secure their kids' online activities. The tooling on most platforms (looking at both Apple and Google, although Microsoft and Sony are similarly bad) is tucked away, not intuitive, barebones just so they can claim "we have parental control". Most routers, phones, laptops, consoles, etc. all do the same. You need to be on sysadmin level to properly set up security rules for kids, something that should come out of the box. If we've managed kid-safe containers for medication, washing up liquid, dishwasher soap, bleach, etc., surely we can manage a properly unified approach to protecting kids?

Oh but of course that's not a priority for our hyper-capitalistic systems.

Overall, no, I strongly disagree with your opinion on making the internet a shittier place just to protect kids. It's like recommending a sex shop to have a child friendly lobby in case a parent let's their crotch goblin wander in... idiotic and the polar opposite of what we should be doing.