Sorry, Jumping how would a disabled-access toilet marginalise people?
That was just one example of legislation in the workplace - employers, cutting margins and saving costs all over may decide to employ an able bodied person rather than spending money, on, say, appropriate equipment to allow a blind person to act as telephone operator because of the prohibitive cost.
New buildings come under different legislation, but companies housed in older buildings, the prohibitive cost of widening doors and the in put of ramps.
These bits of legislation were designed to facilitate an equal playing field, but on occasion, they have been an obstacle because of implementation costs.
I used to read blog about a lady who had gone from able bodied to virtual lower body paralysis after a car accident, she had one of the sharpest minds I've ever read. However she was reduced to working in charity shops because no one would employ her. She cited a lot of the legislation put in place actually caused her more problems.