I'm not surprised at this. There's a natural human bias towards attractive people, not just in therapy but every area of life. Even when they're not attractive personality-wise.

Neither of my therapists are what I would call attractive, although neither are ugly either. I didn't find either of their pictures that attractive - one looked too edgy and the other looked too stylish (the kind of person I feel like an overgrown clumsy giant around), if that makes sense - so I just trusted the people who referred me to them.

As you say, it doesn't make sense. It makes sense to decide based on a therapist's gender, or age, there are therapeutic reasons for that. But attractiveness? Not so much, though like I said I think it's natural.