You think that pro players are deciding to stop, step and jump putting, because they feel bad that it places their opponents, in a bad rules position?
Some do, at least with the step-through. Or they've consciously not developed that move because they think they should be able to hit a 35-footer without it.
I don't know the history of the rule too well, and this may have already been debated extensively. Maybe it's because more players have microphones in front of them these days, but I hear a lot more complaining about the step putt now than I did when Feldberg first started doing it. Probably because so many current players doing it wait to release until their step-through foot is almost on the ground, if they actually do release on time.