IMO, it's insecurity. A deep-seated feeling of being less than others, a loser, trash and/or any other names we all use to demean others. Anyone who watched "The Queen's Gambit" knows that janitors can have a powerful and positive influence on the lives of others. It happens everyday with retired people and their grandchildren or neighborhood children regardless of their career success or money in their bank account.
It appears Anthony Warner didn't have anybody, or so he thought. That's a bad part of mental illness; the irrationality in decision making.
Makes sense: Inferiority complex -- fear of being perceived as a loser.
One of my my favorite jpp myths was the poster who claimed to be US contractor in Iraq in the mid-2000s, working in the Green Zone and supposedly dodging IEDs and insurgent attacks. It was all horseshit