The thing I'm concerned about is that reintroducing cars into these areas is a trickle opening onto a floodgate in terms of causing us to backslide into car-centrism. And by your argument ADA compliance becomes a good excuse to erase all the pedestrian- and cyclist-only areas and replace them with "good old" city streets again. It effectively becomes an argument for people who want car-centric infrastructure only to disguise their desire and hide behind the disabled to accomplish their goals.
What I'm wondering is if there's a way to accommodate without using cars? In a market we could provide some scooters or other motorized transport that's more compatible with the market's layout.
Also, a mobility scooter is a perfectly acceptable form of transportation in pedestrian areas.
If you go from heavily vehicled areas to large pedestrian areas where vehicles are banned, you've gone from one extreme to the other. In both cases disabled people are left behind.
> The fact is that us able-bodied people need spaces that we can enjoy too.
I thought that was everywhere, including nature.