It’s the same word as “disabled”. Those of us who are T1 really are disabled; a part of our body doesn’t work. It is completely correct to say I have a disability, but disablement is not productive; I can’t produce insulin, but I sure as hell can tell you you are a fool. I don’t because each of our disabilities are an essential part of who we are.
A recent topic, perhaps not here, comes to my mind. I am a cyborg; I’m an artificially enhanced human being. I’m proud of that; I can do things other human beings cannot do because of my enhancement, though I would never denigrate another human for their lack of BG control.