If the 3rd party module is popular, its badness will affect other people too and either the module will get improved or well known workarounds/"best practices" will develop. With AI-generated code, more often than not you're the sole user.

Trust and reputation.

I would use Stripe, curl, and ffmpeg without audits, because I trust them to provide good code and to respect their API. I wouldn’t trust AI to write a Fibonacci series implementation.

The AI has no reputation to wager for my trust.

stars on github? I've wondered the same thing.