I don't think you can make an argument of the bolded portion. Are you saying that they will not hire you for the job, other thing equal, if you had a fellowship? That makes no sense to me.
If I was in a group that was filled with generalists, and I had to choose between a pediatric anesthesiologist who's been doing only peds for 5 years and a fresh graduate, I would pick the fresh graduate.
If I was in a group that did only anesthesia, I would definitely not hire a CCM/pain fellowship trained person who expected to do CCM/pain regularly.
1). This is not true. Having done a fellowship does not make you doomed to have someone take your revenue, nor do you have to be straight-salaried. How you equate the two is beyond me.
A group that advertises "CCM fellowship required" for instance has a level of complexity and hierarchy that doesn't engender itself to a non-salary payment structure. You're already classifying people based on extrinsic factors, not on actual work output like a unit-based payment structure.
In other words, it's an academic-private fusion... these are typically unequal.
Would you expect to be paid more for equal work just because you spent an extra year doing something that the other person didn't? An academic group would say yes, true equal private group would say hell no.
2). Yes. If you want to live where there are people. They usually require you be more trained to do certain type of cases (e.g. hearts. But on the other hand, i have never had anyone tell me I can't do blocks because i didn't have a regional fellowship). But doing a fellowship does not mean you have to live in those places. It means you're better at that sub specialty. Where u want to live does not dictated your fellowship nor vice versa.
I meant to say that highly desirable geographic locations tend to require fellowships, but they'll also be unequal, favoring the old partners, because they have the upper hand in that labor market.
Those positions tend to pay less than geographically worse places.
3). This is only true if the group is desperate, e.g. extremely low supply of fellowship trained. Otherwise the door is closed to you if you don't have a fellowship. Also I have never heard of anyone letting me do chronic pain for $50k less per year w/o fellowship training.
If the door is closed because you don't have a fellowship, maybe it's better that you didn't take that job anyway (reasons above).
Regarding pain...
Either you can do chronic pain or you can't, whether by skills or by bylaws.
I know of plenty of non-fellowship trained anesthesiologists, who are recent graduates, who are now doing occasional pain days.
They bill on procedures, is blind to fellowship.
4). This is true whether you have done a fellowship or not. Pigeonholing of any sort can give you skills atrophy. Again, neither a necessary nor a sufficient result of a fellowship.
Having the fellowship advertises the fact that you might be skills deficient compared to a generalist. This could hurt your chances.