To my mind, the key thing you mentioned is the benefit of the doubt, keeping in mind that this may have caused the person to no longer be in active service. It may have ended their career prematurely. They could be under a lot of stress mentally and physically because of the injury. The benefit of the doubt allows that member to be treated fairly. Veterans Affairs provides what they need both physically and mentally so they don't go into a tailspin—any more than they may be already.
Is that generally the idea behind that practice?