I'm a perfectionist and like CJ said I've got the biggest target, therefore, I have to patch up anything that leaves an opening or the opposing GM will try to pull it up and sack me like crazy in this case.
Remember when we were sold on how QBs scramble now!!! and then quickly learned it attached to long passing, therefore, on 1 play you'd get a 10 yard run and then on the next a -10 sack for an off-set aka useless addition.