Saying this to a parent of a kid with executive function problems is rather like saying the wheelchair ramp only works for people who can walk up the stairs. If a student’s problem is that they are catastrophically disorganized, then requiring them to organize their disability support is the same as saying your support for their disability is effective only if they don’t have the disability.
You may say that students with executive function disorder just don’t belong in college. But don’t say that you offer support for their disability, if that support is contingent on their doing something they are unable to do.