The Justice Department filed a lawsuit against Uber Technologies Inc. for discriminating against passengers with disabilities, including those who use service animals and mobility devices such as stowable wheelchairs. Uber is the largest provider of ride-hailing services in the United States. The lawsuit seeks $125 million for individuals who have been subject to discrimination
Accommodation requests have to be reasonable. If the wheelchair won’t physically fit in the car then you can’t force the driver to drive an accessible vehicle at all times. That would be unreadonable. Though they can’t deny rides to people if the wheelchair could fit in the trunk or whatever.
I don’t think the commenter wanted drivers to let people squeeze their wheelchairs into their tiny cars, rather that taxis are convenient because they can probably specifically request one that accommodates them. I’m guessing Uber doesn’t let you do that, but I somewhat certain Lyft let’s you notify potential drivers that you are wheelchair-bound in case their car cannot fit you.