My kid begged me to play Roblox with her friends when she was 7, and I looked into it and immediately recoiled... Why is so much children's content crowdsource

My kid begged me to play Roblox with her friends when she was 7, and I looked into it and immediately recoiled... Why is so much children's content crowdsourced and MMO these days? AI-based moderation and whack-a-mole approach to letting strangers play with my kid and what content my kid sees is not a good plan. I honestly don't understand how this is the business model of so many companies - so much that submitter has to create a post dissuading more from cramming into a crowded space.