Ok, but I assume (could be wrong) that's because of the difficulty of creating your own water/sewage/electric service. But isn't it comparably difficult to create your own app store or payment processor?
It's not just difficulty- it's really not a good thing for anybody if you have three different sewers and four different electrical service lines running to your house. It's expensive, wasteful, a mess, and can even degrade quality of service.
But a variety of app stores or payment processors functioning over a common carrier (ISP, USPS) is a good thing.
