I respect various opinions and see both sides.
I have a very different perspective on the reps impact. Many years ago, had a son that was a soph on a 5A state championship team. Because they were very good and opened up leads sometimes pretty quickly, he got tons of experience getting friday night reps in the 2nd half against starting lineups and second string players. There is no doubt that experience helped him prepare to be a 2 years starter for that program his junior and senior years. Playing against freshman and other sophs during Saturday's JV game did not offer that caliber of experience. Was it essential? Perhaps not, as the majority of his development came in practice against older state championship caliber players. But was it a plus for his development beyond playing JV ball? Absolutely.
I guess I am old school and during my days, played on both ends of wide score margins. I survived and wasn't harmed long term to experience some beat downs. We all know life itself will offer some beat downs, and calling time out or simply ending it early isn't always or even typically an option.
I thought your 10 run rule in baseball was a good comment....but unless things have changed, I believe both teams still have to play 5 full innings.