That's true, choice is a good thing until you are blind and then you have no choice. In the US, the whole point of Section 508 is to protect the minority. If you left it up to the market, the majority of people who have no disabilities would be the ones who are catered too and a secondary market attempting to address the needs of people with disabilities would have to spring up. Most likely, things in that market would be inferior on the whole to their counterparts in the mainstream market simply by virtue of there being a lot less invested in them. That is not what we want, someone who is disabled should have the same choices as someone who does not.