Therapists are only supposed to open their mouths when what they have to say has some value to the client.

I don't see how "you're not resilient" has any therapeutic value whatsoever. It's creepily like what those nasty little pick up artists do when they 'neg' women. It's a tried and true technique for manipulation, so I think your gut instinct that she's looking for submission is probably correct.

There are people, and some of them are therapists, who like to collect weaker people around them to abuse when it suits them. I see telling someone that they are weak is testing behavior. Will you accept that? Will you become more submissive as a result?

A therapist isn't supposed to sit there and tell you who or what you are. They're supposed to help you find the best version of yourself. Her comment was thoughtless and inept at best, and grooming behavior at worst.