I've seen several talk specifically about money/hours, but there's so much more to the equation. It's about having autonomy as a physician, some semblence of respect in the workplace, and security, assuming that exists in any field of medicine.
1. autonomy- you may be allowed to "play doctor" as long as the anesthesia you deliver is what the surgeon is expecting. they are trained to do everything the same way, every time while we are trained to treat each patient as an individual. The two can be directly contradictory. When they are, you will have to ask permission.
2. respect- you will be a second class citizen within the physician community. I've even had psychiatrists for whom I was doing ECT's that tell me specifically how many mg of propofol/succ they want "their" patient to have. Nobody has a clue what we do or how deep our knowledge is of physiology and critical care. Every day you can choose to argue your relevance until you are blue in the face, or quietly assimilate. You may go back and forth, but it's a battle that grows old. Furthermore, if you are in a model such as an AMC, an employed physician within a group hoping for "partner" (or maybe not even), or something similar, you will quietly assimilate.
3. Security- you can theorize all day about the dangers of other specialties, but our's is clear and present.