Pinkies are basically like eating mcdonalds. They have virtually no nutrients in them (just fat). They don't really make a good meal for a ball python.
This isn't really true. the prey items won't just line up in the stomach like tetris blocks, they will overlap and move around. I once had to feed 4 prey items in one sitting (because I ran out of properly sized rodents) and everything went just fine. If that logic were true then there "wouldn't be enough room in the stomach".