No, treating people exactly the same in different circumstances is mistreatment. You wouldn't expect a person in a wheelchair to be a shelf stacker or give him jobs involving going up stairs.
Actually..in the US if a disabled person (BTW I am one) applies to a job , and the job can be modified (the person stocks movies instead of heavy items or they put a ramp/elevator/lift on the steps) they cannot say no because of his disability IF he qualifies.
The American Disablities Act protects disabled americans from discrimination.
I know someone paralyzed who is a semi truck driver. He transports HUGE loads. Not a small little truck. They just put in hand controls.