I don’t like it, either, but it does ‘help’ get the teams on the field and ready to play, as compared to before this rule, even with the ‘pump up’. As I’m sure you know, this is all to help keep the game to fit in the magic 3-hour window for TV. So, TV takes the few extra seconds it saves in actual game time and steals it for another commercial. Still a 3-hour+ game, but with a couple of additional commercials.
If the NCAA want to shorten the games, they just need to get control on commercial breaks. They are up to 3:35 each for regular breaks in many games. 2:30 were the longest during my FBS days, and those were period changes.