Statistically, protective factors against suicide include support and purpose; conversely the absence of fear along with those can make the difference between attempting and ideation (so they say).
But no one knows but the person themself- perhaps not even them. The presence of pain, sensitivity, drugs/ alcohol, drug reactions, poor impulse control, of course depression, undiagnosed conditions, etc. Etc.
I think it is naive to say lacking resources allows for the same care, or abundance of or quality of care. And being in need does nothing to reduce the stress cup- many stressors or problems can be solved easily if one has the money to throw at them. But sensing happiness is also affected by the reward centre of the brain, is affected by memory, and by being true to one's self. Most of everyone's public persona is just that- a facade. I think too gratitude and happiness go together, in the way that that is mutually exclusive to trying to fill the holes in our hearts with anything else we can try- money, objects, attention, adoration, self-medicating, diversion, distraction, sex, relationships, even anger +/or competition. The list is endless, from attaining more and new to changing one's self or trying to change others. I'd rather have less I enjoy and love, than more of what means little or is transient, fair-weather, boring or 'disposable' , to me. If I don't want something genuinely, not because others have it, how will I ever value or cherish or love it?
I think one thing that has a greater possibility of being true, is at least in that moment, was that his resources to cope were dwarfed by his pain, or rather his pain exceeded them. Most people with SI by that time aren't even shooting for 'happiness' or anything future-based, at least not initially, rather just being able to bear it. In fact, I'd say it very possible a thought that his wife and kids would have money even if he wasn't there would bode for SI, not against it. I'm also not sure if what he described as a lack of confidence should be used interchangeably with self-loathing. Perhaps what he called lack of confidence -especially on a public interview the world could hear- was a minimizing expression of very deep emotional pain and scars? It certainly sounds like it could have been.