I think every staff member in the hospital *potentially* has something truly valuable to offer to patients and the team. I've learned alot about lac repairs and slit lamp exams from a PA I worked with in FastTrack in the ED, and have seen nurses do amazing things for critically-ill patients (like spare them central lines by managing to access veins in unimaginable places!). I've also seen RT intubate people in a community hospital when the IM-trained hospitalist wasn't able to do it (and anesthesia was too busy to help right away). However, what really bothers me is that I too often see certain midlevel providers wearing long white coats with their hospital ID badge turned around (!of course unintentionally!), and then not introducing themselves as PA/NP to patients, and responding to patients when being called "Dr." and not correcting the patient. If a med student did that, they would be toast...and for good reason. This is an ethical, patient safety, and liability concern, and unfortunately it is not only the midlevel's license on the line, but the attending who is "supervising" them and co-signing their notes/orders.
I've also seen ED pharmacists block MD orders, and require the MD to print out a scholarly paper proving he was right about the dosing/route of drug administration in a critically ill patient. Its one thing for a pharmacist to inquire about a possible error they've picked up, and its another to require a senior attending to prove to you that he's right, when he not only has 4 more years of training than you do, but understands patient care from a perspective you haven't experienced...
As a fourth year med student, I would be the last person to claim I am ready to take care of patients independently. I have only had 2 years of pre-clinical and 1.5 years of clinical education. However, I also am aware that PA's/NP's often have similar/less amounts of education than I do, but far more autonomy. I don't want that autonomy at this point, because I'm not ready (yet)! However, if I'm not ready, I worry they might not be either...despite their outward appearance.