Being a disability expert of some kind doesn’t give you the right to violate boundaries. People with disabilities are people. Being an expert of some kind doesn’t mean you have a relationship to them. It doesn’t mean you have any authority over them, either.
Being a parent of a disabled kid isn’t permission to take on a parental role with every disabled person you encounter.
Being a nurse doesn’t make it ok to ask people with disabilities invasive medical questions.
Being disabled doesn’t make it ok to tell other disabled people how to live their lives.
Being a special educator doesn’t give you the right to tell disabled people how their minds work. Or what they can and can’t do. Or to force them to make eye contact.
Being a therapist doesn’t make it ok to take on a therapeutic role with every disabled person you encounter. Treatment requires consent; being a therapist doesn’t make you an authority on anyone else’s life.
Being a researcher doesn’t give you the right to tell people with disabilities what they can or can’t do, or how they should live their lives.
Being disability staff doesn’t mean that random disabled people you encounter in public places need your help, or that you know how to help them, or that you have the right to tell them what to do (actually, that applies even when you *are* someone’s staff).
People with disabilities have the same rights to privacy and autonomy as anyone else. No matter what kind of expertise you have or think you have.