I think if you exercise your state of mind - my state of mind - is usually more at ease ready for more mental challenges. Once I get the physical stuff out of the way it always seems like I have more calmness and better self-esteem.
It's a very complex scenario and certainly Dave was and is not the only...
My Daddy liked physical fitness and wanted me to be a prizefighter.
But there are too many people that make so much money at the cost of lives of other humans and for no reason but to make the money.