Except for the fact that people with ASD / Neurodiversity are often more likely to be passed over during interview and selection processes as they don't fit the social norms that hiring manager also expect.
So even if they are more likely to be diagnosed - and I presume you mean White 'Men' explicitly, as Women are even less likely to be - they're also more likely to not 'sell' themselves during applications in the expected corporate way, and therefore not get the high-paying jobs.
Diversity is not just Race or skin colour, but that's easier to see (and to consciously bias).