This doesn't make sense to me. If a driver isn't capable or willing to be ADA compliant, then why are they driving other people? They shouldn't be.

That's saying that people with disabilities shouldn't ever do jobs unless they can do 100% of the job.

Instead, the ADA says that companies must make reasonable accomodations for the employee.

In this case, it means drivers with allergies don't have to take animals in their cars.

For someone with a back injury, it might mean they can stock shelves so long as items are kept under a certain weight.

There are plenty of instances of people with disabilities not having to do the full job, because they can do most of the job.