Just go home and go back to work. Winning coaches aren't going to vote for that. Sorry coaches want that. There are problems with such a rule in basketball. These are both examples of sports in which the ability to come back from such deficits is minimal.
Basketball is a game of momentum.
A team could be down 30 points in the second half and still win. With the 3-point shot, a game that appeared out of hand can quickly become a ball game. The seconds lost by a running clock while the scoring margin was more than 30 points could be seconds that save a team from an embarrassing loss after being far in front. Breithaupt, whose teams set state scoring records when he coached at Hardin-Jefferson, is against such a rule, but not because he's for embarrassing an opponent. He is opposed because it would limit the playing time of non-starters, who often don't get a chance to play.