@HellloBambinos I would suggest all the things I've already suggested. I.e improving transport networks and options that incentivise those who are able to use said options to use them, rather than taking away the freedoms of those who can't. Yes, there'll always be someone who just can't be arsed, and will choose to use their car anyway, much like there's always someone who can't be bothered to walk the two steps further up the bus to a regular seat and will choose the only raised seat there is etc. But if you've moved a significant proportion of the traffic off the roads or out of the city, then why is that not good enough? When I was able to do so, I would've much preferred to get the train in to the city, but often the timings or the cost was prohibitive - remove those barrier for most and it will have a far greater benefit than removing my right to drive the vehicle that I need.
If you cannot see how narrow minded you're being by saying "ah yes, but we'll allow those who meet some arbitrary standard to have x or y vehicle" then you really are quite ableist.
Not all people living with a disability experience a specific set of problems... I didn't wake up one morning with my problems, they came on slowly, insidiously. If I hadn't had the freedom to be able to purchase the right car for myself at the right time, I certainly wouldn't be able to do the job I do now, I wouldn't be paying the honking great amount of tax and national insurance that I pay each month, and I wouldn't still be able to be an active member of society. If I'd had to wait to be "disabled" enough for those things, I'd have probably given up on life full stop.