So when there is a direct or close hit to a hangar or aircraft carrier, RAF staff will not be expected to run, and/or carry wounded colleagues or kit to safety, and fight fires or floods etc?
Or "Right, listen up; there is no transport available but we need to move now and take our kit five miles across these fields........."
A person who cannot run or fit through small gaps or climb obstacles for example, would be a liability and a danger to their colleagues, and cause extra problems. (And there is no need for service personnel to be unfit or overweight. Discipline is a basic requirement in the forces, so self discipline would be a pre-requisit, I would have thought?).
Yes, autistic and Asperger's people are very good as engineers and tech crews - (Apple actively employ many of them) - but all military personnel need to be fit and healthy.