Sorry but reality doesn't stroke with your concerns. Old people are stuck in car centric cities when they can no longer drive. Disabled people are stuck in car centric cities when they cannot drive. Cities that prioritize other modes of transport have more options available to both groups and you're mad over nothing.

Edit: just look at Dutch walkable cities as an example - they're perfectly accessible for old people and disabled people. Sorry but the idea disabled people can only use cars and need car-centric infrastructure to live in a city is delusional.