It would be ironic if some of her self-discipline techniques were even Cardassian in origin, even if they were part of a technique given to her by another species! For my Betazoids, I think the most that a fully telepathic Betazoid would be able to do would be to learn to block images and words. But I'm not sure mine could stop sensing emotions without taking drugs or having invasive surgery. Some of the most powerful ones (like my Professor Shalwa) may not be able to fully stop "overhearing." The best they can do is learn discretion, and be very, very careful about judging people with only fragmentary and very out-of-context evidence. (Actually, I think it's this kind of discipline on Professor Shalwa's part that made her the good diversity instructor. She hears things she can't help hearing, but she learned a way of thinking about it, and appreciating each individual as they are, that turned into an appreciation she passes on to her students. ) With his strong sense of honor, I can see why he'd feel that way, even though I agree it's not the same.