Jobs was a textbook narcissist. Absolutely by the numbers. But unlike most narcs he was actually good at some things, and he used those talents to create a Steve Jobs Memorial Corporation - i.e. Apple.
The narcissism was the source of his drive to be the most amazing monkey in the room. If he'd been a normal human he wouldn't had the laser-like focus on creating a narrative about being the guy who made everything he touched game-changing, immaculately crafted, and insanely great.
If you happen to be a narc you may have similar motivations. But it's unlikely you also have the talent.
Which leaves a question - is it possible to be a billionaire wo makes game-changing, beautifully crafted, insanely great tech without being a narcissist?
Arguably the 60s/70s crop of tech companies came closest. CEOs like Ken Olsen had a paternal attitude and an interest in employee welfare and development. DEC were insanely great in their own pre-Internet way, so he must have been doing something right. But there was no worldwide media attention, and the market was almost exclusively fellow grad-level professionals who were more impressed by substance and less by showmanship.
As soon as you open that up and create commodified mass-market products the level of attention goes up a few orders of magnitude, and a self-absorbed rock star attitude is more effective market fit.
Non-narcs just don't care about that kind of attention, and aren't driven by a need to create it.
Which is non-narc CEOs may be millionaire successful, but don't have the unhinged drive needed to be billionaire successful. And they won't have the kinds of followers who need the reflected glow.
And that's why the top of the tech tree is full of people who have these personality issues. They're unusually effective in some very limited areas, and a cocoon of money protects them from consequences. But they're still... limited.
A real game-changing genius would be able to negotiate the attention and rock star challenge to do everything they do without paying the price of narcissism. But those people are not just vanishingly rare in general, they're actively cancelled by current corporate culture.
And this is a bad thing, because we're going to need effective but healthy management over the next few decades. And it's hard to see where that's going to come from in this culture.