OK fine. So let's assume that chipped stickers are an advantage. There are a few ways to rectify this:
1. Force people to use new stickers in competitions. This would be incredibly expensive, since small chips/scratches can occur often and not after much use.
2. Create stickers that never chip. This again would be impractical for people who can't get them or afford them
3. Remove stickers completely and move to stickerless cubes. But then people can use the larger advantage of stickerless cubes in competition because we don't allow something that's more likely to be just a distraction.
Maybe in a perfect world you could say no sticker damage, but this is real life and stuff happens. What we have at the moment is the best compromise on practicality and on ease of enforcement. If you are using small chips in stickers to cheat, then you should feel bad and also it would probably be noticed during your solves.