There are cases when providing service for remaining 2% isn't profitable. It's better just say "sorry".
I used to work in company where we have spent a lot of time making custom fixes for our software in order to work-around wired hardware/software bugs on machines of individual customers. Yes, we provided service for remaining 2% or so, but in cost of slowing-down overall product development and not making our product better for remaining 98%.
So how about also getting rid of all regulations for wheelchair friendly infrastructure while we are at it? Way too expensive and it is even less than 2% of the population that requires it.