If the lawyer feels like an imposter in her current role, that's different from feeling like an imposter in a role you don't even have. This is the distinction I'm making, and why I think the label doesn't fit. Should I feel like I have imposter syndrome because I'd be uncomfortable as a professional athlete, something I don't do? Or should I just realize I don't have confidence to do something else? To me those are very different. Recognizing I can't do everything isn't a form of imposter syndrome - if it is it makes the label completely meaningless.
I'm aware it's a psychological condition. We're arguing over something we haven't even defined yet though, so how would you define it?