The same people who didn't understand that Google uses a SEO algorithm to promote sites regardless of the accuracy of their content, so they would trust the first page.

If people don't understand the tools they are using and don't double check the information from single sources, I think it's kinda on them. I have a dietician friend, and I usually get back to him after doing my "Google research" for my diets... so much misinformation, even without an AI overview. Search engines are just best effort sources of information. Anyone using Google for anything of actual importance is using the wrong tool, it isn't a scholar or research search engine.