Are you actually making an "tyranny of the minority" argument against disabled people? :O
This is one of those basic human rights things. Especially if the service your site is offering is important or one of a kind. And especially as more and more things become accessible only through the internet.
Sure. They can order a pizza. Notice that I mentioned that reasonable allowances for disabled people can make sense, but I see no reason that a tiny minority should dictate the design viewed by a vast majority.
This is one of those basic human rights things. Especially if the service your site is offering is important or one of a kind. And especially as more and more things become accessible only through the internet.