With ADSL, you can upgrade one CO and spread the costs among rich AND poor areas. With VDSL2, your meaningful service area is about 1,000 feet... and deploying a new VRAD in an area without existing fiber within a mile or so isn't cheap. Unless they can find enough rich people within a thousand feet who can't get service through an existing VRAD, those poor areas aren't going to get faster service.
God, it hurts defending AT&T... but even if they were actively benevolent, VDSL2's short range makes it really hard to cost-effectively serve poor areas UNLESS those poor areas have lots of people willing and able to buy premium internet service.
Going back to the rural electrification argument, yes, you can force the power company to provide you with power almost anywhere adjacent to a public road or right-of-way... but if you decide to build an Aluminum-smelting plant in the middle of nowhere (Aluminum-smelting uses a STAGGERING amount of power), you can't legally (or reasonably) expect the power company to upgrade 100+ miles of wiring for free, even if they WOULD provide you with up to 500A service for free.
The best way California can get Uverse into poor neighborhoods? Find all the properties in the area owned by the city/county/state due to unpaid liens, and offer one per ~2,000 feet to AT&T for free (waiving those liens) as a neighborhood VRAD site. Most poor areas have vacant properties that can't be sold, because the liens exceed its value. Making some of them available to AT&T as VRAD sites would make it easier for AT&T to justify the cost of deploying 50mbps+ VDSL2 into those areas.