So we can eventually classify AI models as Software experts, but not as Medical experts, why so?

I don't classify them as software experts either. Anyone doing so is probably not an expert themselves.

I take them as those code generation command line tools like create react app and such.

We can't. It's just that everyone and their dog has an interest in selling you that lie because money.

Stochastic parrots can code yes, but that does not make them experts. Don't trust them with your life.