Tommy is a master swordsman. He rolls a one and misses the enemy. "Oh, well, you can't hit them all," he thinks.
Then he rolls another one and misses again. This time he gets mad.
So we make a rule that he no longer has to roll to hit because it's beneath him.
But now you're talking about attack rolls not ability checks. Sure, on pure principles they are the same I guess but my understanding of OP's request is to remove the critical 1/20 in ability checks, not attack rolls.
