Yirmin Snipe,
Have you ever had to help you 86 year old mother get from wheelchair into a car, when the parking space next to where you had to park (no handicap parking) only to find that there isn't room to open up the door and push the wheelchair up to the it to get her out and into the car ? 
Or, take your 35 year old son, who is paralyzed from the shoulders down, to the Mall but there is no place close enough to the entrance to park where you can use the lift to get him out of the van in his specialized van withhis oxygen tank ? After all, you are a 69 year old mother who has a difficult time pushing the chair as it is. 
I realize that some folks are uncomfortable with seeing or looking at the disabled and would rather they just stay home, but if it were you who had been in an accident that left you in a chair, would you want the right to be able to go to the Mall ?
Not everyone in wheelchairs can "wheel" themselves around for various reasons.