Give me a break, man. This response reeks of very little exposure to PAs. PAs are assistants largely in name. In many settings they have as much autonomy as they are interested in. In an FM practice, the PA and the doc are working most of the same patients. The doc maybe has gets a few more interesting cases, but for the most part, the census is identical.
In surgery, yeah, a PAs going to be doing more assisting, but even then, they're probably opening and closing a decent number of routine surgeries.
Commitments, I'll give you, school-wise. MD/DO school is longer and residency is pretty brutal as well. PAs have a rough 2 years, but are out after that in the real world. In the real world, expect call and overtime as a PA.
Earning potential is a maybe. In FM, your doc and your PA probably aren't making vastly different sums. In surgery (especially sub-specialties), yeah, you're earning pretty different salaries. But even there, PAs make out pretty well and probably earn more than an FM doc does.