Well, no way to prove or disprove, but as I said, a couple of things. Most people in the bottom 60% will have most of the things in that tiny list. It's very easy to recover from bad parenting. It's harder to recover from a bad environment AND bad parenting.
And to be clear... I'm in the "bad environment, good parenting" quadrant. I still ended up homeless at one point in my adult life.