No, you don’t. plain and simple. Tons of people living together share the costs. the few in the suburbs need to pay for their own infra. They’re not now. The cities are subsidizing the suburbs. that’s not fair.
Instead, the recent trend has been that wealthy areas near downtown (e.g. Buckhead) have been trying to incorporate so that they're no longer subsidizing the rest of the city.
As an aside, the countryside can survive without cities but cities cannot survive without the countryside. Perhaps consider your dependences before brazenly brushing them off.
Cities need farms (a few people and a few roads) they don’t need suburbs (people wasting resources, living large, and stealing tax resources from the cities to subsidize their lifestyle)