Now, without additional legislation and strong-armed tactics, it is far less possible for that to become a common viewpoint (the one you yourself hold about people with disabilities).yes the argument could be made that it promotes people to educate themselves and realize that people with disability dont just sit in a corner and drool on themselves
You promote a notion that people with disabilities aren't a certain way. I guarantee you that is the result of numerous court decisions, legislation, regulation, desegregation, and employment protections.
Without strong-arming the public, you have a more difficult time swaying the opinion of the masses.
Now, if we moved the other direction, and placed more legal restrictions on people with disabilities in many areas, it will become a whole lot more likely a social rationale will trickle to the masses justifying such measures (and more).
Social norms come with a force all their own.