Yep, I was sure AI can be used to improve SEO. But, as you said, this is now about more than SEO, as users who ask questions to AI models don't go through the classic searches anymore.

Regarding the advice the AIs are providing you, it doesn't hurt to compare. Either ask the same question multiple times to the same model, or better, ask it to different models and compare. Even better, ask a model, implement changes, feed the changes to a second model and ask it for feedback. It'll give you a different set of improvements/optimizations to work with. And also, if you don't understand something an AI asks you to do and you can isolate the question, ask it to a different model and demand clarifications about what that particular thing means (you were talking about schemas, for example, and not being sure your changes were correct).