Well, I happen agree with this allegedly controversial opinion, but the fact that we invent legal fictions like "nurse practitioners" and "physicians assistants

Well, I happen agree with this allegedly controversial opinion, but the fact that we invent legal fictions like "nurse practitioners" and "physicians assistants" I think sort of proves the point that it is controversial in the wider public consciousness. We create these roles and gradually give them more and more autonomy precisely because we can't agree to produce (or import) more MDs. MDs actually see the writing on the wall, too. Their lobbying organizations are strenuously opposed to expanding NP and PA roles.