Compare that to an NP that went from their 18 month NP class, to work in primary medicine/family practice office - and lets say they work there for 10 years, so great, now they are an experienced NP in family medicine (and someone I for one would be perfectly happy to see as a patient for most routine things) - but what they don't have is the experience in all those other areas that matter - even if they are not practicing it.
There is just no shortcut without putting in the time - thousands and thousands of hours of study and patient facing experience under the supervision of an experienced MD.
There is nothing wrong with being an experienced NP seeing patients (and that is mostly who I end up seeing) - but there is simply no reason to somehow 'promote' those people to doctors - they don't have the same skills or the same experience, and doing so doesn't solve any problem.