Is there a technique that could help people not only overcome compulsions, but actually move them to finding their previous behaviour repulsive?

If not, why not?

It would be so valuable for smokers, for example.

Imagine a smoker walking into your consulting room, compelled to smoke 20 a day and walking out feeling absolutely repelled my the very idea of smoking.

Come on, folks. Surely there's a one-hit fix available.