If a wheelchair can get to a location, a baby carriage and rolling bags can too!
On the other hand, there are some issues no law can correct. Do you want me to operate a train or a plane, and have to see signals or runway markings, considering I am colorblind?
In a way, the ADA is like PTC. Great idea, but sometimes lacking in some details. Cause: Pols who want to "feel good"!