That’s not what I meant. But, generally most Rav’s come from a family of talmidei chochamim where jeans are not acceptable and if he wore jeans than he might have been different, and I heard of regular people becoming Rav’s not of a BT. Unless he was a BT for 30 or something years. And, no jeans is not something u have to do teshuva for, its not an aveirah for a boy/man to wear them.
For a girl, a whole another story!