See for reference:
Questions about the practice of medicine: Questions about CEU's, and a good response with other site examples.
Both of these embrace expert level questions, which our do not ask somewhat deems to be off topic
trainer certification -- it’s for professionals, but not about the profession
I would propose changing that. I think that if we opened it up to be able to talk about fitness as a profession including continuing education and the merits of various certifications and what they are for, we can get a wider base of very good answers, and also attract the fitness professionals for whom these things matter.
Along with that, as evidenced by this meta question, because we haven't attracted the high level experts, we lose the few that wander by.
This is part of the professionals question from health, as answered by a CM mod:
That's awesome: Professionals asking professionals about the questions they have in this field.
Those questions will and should include certifications, methodology, research and meta discussion, as well as "I get pain in my toes when I squat".
Currently as I look around, I can probably answer a vast majority of the questions with GOMAD. Stronglifts. Spot reduction and somatotypes are myths. Eat less exercise more.
I think we can be a lot more than that, and be successful at it.