From personal experience, the vast majority are practicing out of scope. It would cost them a ton of money in overhead to have a cardiologist deny a claim for cardiology related testing or treatment so they just wing it. In some cases it’s not even a physician, it’s a nurse, NP or PA.
This is where government needs to step and regulate but we all know that isn’t going to happen.
Isn’t the US leading the world in AI? How else will the world access chatbots that make confidently make shit up?