Isn’t route design/planning part of a public transportation system? And even if it weren’t, it’s still a real and valid issue that would need to be addressed. Even if the plan is just to force everyone into high-density housing against their will, you still have the last mile problem, just like cable and internet companies. Either the bus stops at every building (and is therefore too slow to be useful) or some people have to walk farther than others, which is fine for most of us, but disabled/elderly/injured people shouldn’t be further disadvantaged as part of our transportation strategy.