You can (and should) be mad at the government and at Roblox at the same time.
Also, don't use Roblox, you can freely share games made with PICO-8, Löve, Godot, Rpgmaker, Game maker and the like, no need to go to the hell scape that is Roblox and its dark patern and locked down ecosystem.
None of the engines you mentioned are nearly as approachable as roblox when it comes to making a 3D game with little programming or art skills.
Don't get me wrong. I agree roblox is a very shady operation, but that does not erase the fact that their platform is unmatched when it comes to letting kids make games.
When I was a kid I loved this obscure multiplayer game engine called BYOND. In fact it's so obscure that even mentioning it provides several bits of fingerprinting. It technically still exists today, but it's been on life support for 15 years. We should make something like that again.
Besides the game engine, it provided central identity (optional - you could allow players to sign in as Guest), a website to browse games and servers, a forum to discuss games and programming, and an IDE with a built-in sprite editor (it was 2D), map editor and object browser.
My kid does Godot and TIC-80 (a bit like PICO-8 but more forgiving) as well. Those are great but they don’t beat Roblox on distribution nor multiplayer by a long shot.
I agree that Roblox is a hellscape when you want to make serious games, eg make money from it or sth, but if you just want to mess around making a “supermarket horror tower defense” game full of in-jokes and then have all five of your friends join it, and It Just Works, sorry but nothing comes close to Roblox.
Until they required age verification for that ofc.
Also, just don't ever buy any Robux and kids will auto steer away from the shitty games that need it. That filters out 95% of the badness of Roblox right out the gate.