Not that difficult. The policy makers could decide on parameters of distance from play (ball), time after contact, etc. to use to call plays. So much of the action down filed or across the field comes to "What if" scenarios regarding whether a ball carrier "might" break free. Sure, may happen but reducing injuries need to be considered.
Football coaches are amongst the worst chicken-little people where anything they do not like becomes equivalent to the end of the world. It is no wonder that football players and coaches get a stereotype of being stupid.