I kind of agree with you weaver beaver about everybody judging and having a right to judge therapists and make whatever assumptions we want to evaluate their suitability, except I hate the expression "speak my truth."

If you're going to fixate on her weight and if it's going to trigger you, it really doesn't matter why she's fat or if she's a good person - in the context of if she's the right therapist for you personally at this time.