Stereotypes notwithstanding, a lot of regulations/laws do make reasonable tradeoffs. In this case, it appears as if the ADA guidelines do require a taxi driver to help stow a wheelchair but they don't require every cab to be a van equipped with a wheelchair lift. It would be nice if Uber allowed special requests although, of course, the number of options could explode quickly and it probably doesn't fit well with the Uber automated dispatch model.