Mavric
Yoda
I agree. I actually thought that was the rule, but that may be for punts. It's very hard to judge that the rushers up the middle are taking a second to wait before making contact with the long-snapper. It could be argued that those rushers are making contact with the guards first, and then moving into the center. It seems very challenging to officiate, especially if a team does block a kick, and then have it overturned by a penalty.
I would guess that's why the rule is written the way it is. It would be tough to totally eliminate it because of all the jostling that goes on. The defense would probably have to all be outside the guard to prevent sliding into the snapper on accident. One second is supposed to keep them from charging directly into him and give him a little chance to protect himself.