This is a truly interesting question.
Having thought about it again, here is my position. I deliberately did not use opinion because my statement is based upon fact supported by industry standards.
There is a fool-proof way to refer clients to fellow fitness professionals even if one lists many specialties on their profile–simply look at their scope of practice. Working within one’s scope of practice guarantees that the fitness professional carries insurance for the population that they are serving. If a fitness professional decides to offer their services to the general population, then look at their profile to determine if the general population falls within their scope of practice. If a fitness professional decides to offer their services to a particular niche, that make sure the fitness professional is performing services within their scope of practice.
I am not in a position to pass judgment on how a fellow fitness professional decides to market themselves on the IDEA Fitness Connect portal. Too, I don’t mind being perceived as “jack-all-trades” as I know that is not how I define myself professionally.
For me it is not about specialties. It is about scope of practice.