I guess the difference is is that glasses, wheelchairs, and no hands are visible disabilities. Dyslexia and ADHD are not. IMO it's unfair to hide those from private schools or employers. I know many won't agree, but owners of a business or school should have a right to choose who works for them. Public schools do have a responsibility to teach all kids, though.

BTW I am dyslexic and I have never received accommodations as what I am capable of is what I am capable of.