One year older versus three years older seems like a pretty big difference to me. I do agree that there is nothing to be gained by personal attacks and who knows if he was even really 21. Plus I think Logan was held back in like the sixth grade or earlier So it’s not as though he had a lot of say.
Held back one year is so common place these days that it’s sort of like saying you took performance-enhancing drugs to compete in bodybuilding or the Tour de France. So did everyone else. So it’s a level playing field as opposed to noteworthy.