It is a totally different thing to deny someone service based on factors they cannot control as skin-color or disabilities, than to not extend your service to take every group in the world into account.

If i develop a service that is useful to a lot of people, I shouldn't be punished for not taking into account every possible user.

I am not saying that deaf people don't deserve to be able to watch movies on Netflix, but I think that Netflix should be encouraged through grants etc. to make the site more useful for people with disabilities instead of forced.