I have prepared diabetic witnesses with the potential of hypoglycemia in mind.
That a condition may mimic the result of irresponsible behavior does not suggest that the irresponsible behavior can be de-stigmatized. That an individual with diabetes does not deserve to be stigmatized for a similarity to drunk behavior does not suggest that drunk behavior is desirable.
A wide range of mental illness, whatever the cause, is undesirable and a reluctance to be identified with an undesirable condition is reasonable. Where a stigma rests in a reasonable desire (wanting to not have a mental illness), I am not sure that the stigma is removable.