The rural populations seems would not like a redistricting where every district is dominated by its largest population center. Essentially this voronoi type redistricting would push more power towards cities at the cost of rural areas.
It isn't possible to get fair by drawing lines around people which are smaller than the actual sovereign boundary under discussion. You can hand that power to the government, an 'independent commission' (the government with extra steps), or an algorithm run by the government, those are your options. All outcomes will fail fairness, this has been extensively studied.
Pretending that larger population centers will make better electoral decisions and that those decisions will not ignore the legitimate needs of more rural areas reeks of unjustified superiority and is unbecoming.