Sure, there's no reason why apple shouldn't be able to make subjective quality value judgments. When I go to any retail store, the purchasers have already made hundreds of subjective rejections for me. Some stores are stricter than others, and that's OK.

I like knowing that something I buy at Nordstrom probably won't be complete and utter garbage. If Apple wants to be the Nordstrom of app stores, that's their right.