Only 3% of the US is visually impaired, and often poorer than average due to disability, so for the vast majority of individual businesses, ignoring them would be less than a rounding error in revenue, and therefore warrant no consideration of accessibility. But the point of a society is to decide collectively upon certain moral imperatives that are deemed so fundamental to our collective identity as to take precedence over Randian self-interest, righteous indignation about "muh freedumb" and "don't tread on me" notwithstanding. One of those moral imperatives in the US is the protection of the rights of vulnerable minority classes so that we don't become a caste-based society where the circumstances of your birth (or unfortunate mishap) can indelibly decide your fate by limiting your access to society. This is actually MORE meritocratic than the alternative, and so I think, upon careful consideration, you may find that it dovetails nicely with even extreme Libertarianism.