It's a CYA thing. Steam says "we don't allow AI content". Someone shoves AI content on the platform anyways. If it can be proved they violated the TOS, they

It's a CYA thing. Steam says "we don't allow AI content". Someone shoves AI content on the platform anyways. If it can be proved they violated the TOS, they then have the ability to nuke their game and stop someone from suing them. If they can't prove it, well they can't prove it and the game stays. To do otherwise opens up the door to steam having to "vet" all the AI content. So yes AI content will slip through (in massive droves) but it will be indy scene. The biggest impact here is going to be AAA devs who can't just neglect to mention they used AI at some point. This is actually the first thing that could "kill" steam or give Epic a competitive advantage. There's 0 doubt that companies like EA/Activision/whatever want to jump all over AI to make yearly releases like FIFA even cheaper, and if Epic is willing to say "come on over" we might see epic exclusivity for that reason alone, rather than the current "here's a pile of money to make up for all the sales you'll miss out on when no one remembers your game released"