Not sure what you mean by this? I think I understand what you're trying to get at, but I haven't twisted anything to suit any agenda, I am trying to give examples as well as proof where I can.
I agree that where mental health is concerned, this can blur the lines. I'll be honest I'm not sure where you would draw the line between vanity and mental health. It always comes down the same principle though, it's your honest thoughts and intentions. I remember I read a case a while back about a Sikh man who was injured in a car accident, and the Hospital staff shaved his chest for the defibrillator. In such a case that wouldn't be considered a bad action for the Sikh, despite the prohibition on hair removal.
My own few dealings with Sikhs in India suggests they are very upright and serious, is this cultural or down to the scriptures ?
Which is why we have evolved to have less hair. It's not that God decided to give us hair, it's that we have evolved this way in accordance with God's will and as such should respect our form. God didn't actively design us to have hair, it's evolution and nature that has shaped us. It's why I said earlier if somewhere along the line we evolved to have minimal hair, the principle remains it's the non-cutting rather than the having that is the key part.