These are process rules, created because they either make it easier for the referees to call things consistently, removing some subjective aspect, or because it makes the game more exciting.
The other rule I hate, probably IMHO the stupidest idea the NFL ever came up with, is the “crossing the plane of the end zone” bs.
Unless the ball carrier/receiver steps one foot into the end zone, or as he goes down, the ball ends up being in the end zone, it should not be considered a TD. The “crossing the plane” thing is just stupid...
I’ve seen multiple plays where the guy runs OOB at about the one yard line and holds the ball way out over the pylons. That IS NOT a TD!!!!!!