If you're a business owner who falls under ADA, you lost your rights to run your business as you see fit. Nobody has a "right" to enter someone else's property, so the folks covered by ADA were not being denied their rights; Congress just granted them rights that didn't exist--and they did it at the expense of the rights of the business owners.Only OSA would equate ADA with losing rights.
Personally, I think that business owners should make their facilities as accessible as is practically possible, but only that business owner has any idea as to whether or not he will be able to get enough business from that expense to justify the cost. Forcing him to do it, whether it's a good economic idea or not--and at his expense, no less--is unjust, IMHO.
How would you like it if the Feds passed a law that said you had to (not "ought to" or "should consider," but MUST, under penalty of law) make your kitchen accessible to the blind and people in wheelchairs when you replaced your kitchen faucet? That's essentially what they've done here, well-intentioned or not.