Well, the model is migrating to one of hyperspecialists collaborating together. Problem is, this isn't compatible with private practice where you're operating mostly alone, and this results in what you describe. The model has to evolve, yes. Good news is, it is in fact evolving (slowly). We can't evolve faster than science anyway, and while medical science is evolving much faster than it used to, we're far from the exponential acceleration we've seen in other domains, e.g. computers.