I can only think of one, maybe two, Metro stations that I can access with my youngest without carrying him. Many stores I would not be able to enter if I wasn't able to tip the wheels up. Curb cuts are routinely blocked by tourist scooters and anyway people often take up too much of the space on the sidewalk with their vehicles to get through. Add on to the fact that apartment stock must be 95% inaccessible if you're in a wheelchair.
It might be why I have only twice seen someone in a wheelchair in my seven years here. My wife and I have discussed before that, as much as we love it here, we'd move out right away if any of us had accessibility needs.