Chuck Berry, 1958
Johnny Winter, 1969
Judas Priest, 1988
Which one is normal, and which one is 'disordered'?
Matter of Opinion, isn't it?
'Mentally Healthy, or Mentally Disordered/ill'.
Think this line of inquiry is a stupid joke?
Try proving Psychiatric Diagnosis isn't.
Even if you force someone else to sit through these different versions, no matter how much they disliked them all, the victim of your Johnny B. Goode indoctrination is not going to be Brain Damaged and made potentially violent by it.