It's not like they can really avoid it. AI assisted tools will become a standard in the future ("productivity has to go up" after all) and there's a good chance Valve already received some feedback from AAA publishers on that matter, since they'll be the main players utilizing such tech.
The good thing here is the exsitance of a disclaimer on store pages, as it will allow people to decide for themselves, and the ability to report content straight from in-game overlay.
Full on ban was never a realistic option.