That being said, you are not entitled to anything more than anybody else just because of your disability. Nobody is entitled to free coffee, just like nobody is entitled to free cars.
It doesn’t mandate that a business must prioritize disabled customers or even that every person with a disability be able to use the service. Again, car companies are the canonical excepted business, but the ADA cannot force you to serve a customer that your business is not right for.
I’m not necessarily advocating for either side, I just don’t like the idea of an automated process being disrupted when there’s other places someone with a disability can go for the same service. Doing business is mutual.
How you think a car dealership is equivalent to a coffee shop is beyond me. That said, I can assure you that a blind person would be able to buy a car, if they wanted to. That they can't legally operate the vehicle isn't the business of the car manufacturer or dealership.
You are clearly advocating for one specific side. You've only argued for one specific side.