Yes, but those are private businesses. They could just as easily, and legally, make great demands of their customers now. But they don't.
Why should I believe they would begin mistreating their customers if the Real ID were implemented? What incentive would they have to do so?
It's a simple, and deceptive, practice to pursue scary trains of thought in considering what could happen as a consequence of this or that. But applying some cold, hard reality to those predictions is always a good idea.
My BS meter starts swinging over to the right when ever someone starts "what if"ing me with frightening possibilities when the real, direct effects of one choice or another aren't spooky enough.
(If I step outside today, I greatly increase the chances of being hit by a car or struck by lightening. Therefore, I should obviously stay inside all day to eliminate that risk!)
Personally, I don't see too much Eeeeeeeviiiiiillllll in the Real ID act at this point. My opinion could change in the future.