The funny thing is, it's somewhat less useful for certain business stuff, because so much of that is private within corporations. But the stuff you learn in a PhD program is all published. And it's pretty phenomenal at distilling that information to answer any specific question.
Multiple times a week I run into an obscure term or concept in a paper that isn't defined well or doesn't seem to make sense. I ask AI and it explains it to me in a minute. Yes, it's basically exactly like asking a PhD.