How much do you think a one-of-a-kind designer like Jim Keller makes? I'm looking at his wikipedia page, and he's worked for AMD, Apple, Intel, Telsa. They all want him. I can only assume there's a bidding war on his talent.
A big part of his success story, was him having this great opportunity to develop his skills.
Microelectronics is a career suicide in comparison to software today.
I'd say 100 to 1 sieve off rate for people getting into the industry, to ones who actually get to do serious architecture work would be too small. The ratio is likely to be much larger.