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.
The issue is more who does the disclosing. If you don't tell the school or employer, you can't expect accommodations. This school should not be telling anyone. It is up to the student/parents to disclose or not disclose. It's not up to the school.