I can't speak to OP specifically, but I can't help but think this sort of belief explains why there appear to be no shortage of therapists who harm clients due to their own issues. I'm not saying therapists have to be perfect, just that I think it's too easy to say being the therapist would be different and no accountability if/when it proves not to be the case.

OP, I don't know why your therapist said that to you and it seems kind of passive aggressive to me. I don't really think it's her role to make comments like that and I actually think she should be more careful to avoid coming across like a supervisor because that would be a dual relationship. Not to mention something you didn't even sign up for.

She comes across as an absolute idiot with the Lizzo comment. It's like she missed the entire point of what you said.

I gather that all therapists are nervous when they start seeing clients and imposter syndrome seems to be the norm. I think I'd be more worried if you had no anxiety. That said, this therapist seems to be full of all sorts of unsolicited and inappropriate remarks (didn't she tell you how she was attracted to another client?), so I would probably disregard anything she says you don't like. Of course, then you have to wonder if it's worth seeing somebody whose opinion you value so little.