Well paid engineers congregate in CA because that's where the companies that hire well paid engineers congregate, and they (mostly) want those well paid engineers to come to the office every couple of days. I don't know how you could get the causality so completely backwards on this.
Anecdotal evidence: I moved to CA twice as an engineer.
Once to get my masters after college. Stayed for 13 years. Left during COVID.
Second time to raise kids.
Our reasons include weather, intellectual atmosphere, safety (in many regards), schools, and job opportunities.
The geo area sandwiched between Berkeley and Stanford is only rivaled by Boston. You think Stanford and Berkeley are in the Bay because they’re told to?
And I would also question: what’s the point of living in US if you’re not in California? Once you decide to not live in CA, a bunch of other countries rank better than other US states. Such as Canada, Australia, New Zealand.
If I were to not live in CA, even the imperial units would quickly become annoying.
I think you're wrong. The concentration is for a host of reasons. Witness the large number of cities and countries that have tried to create a local Silicon Valley competitor unsuccessfully over the last 25 years.
The data centers I think prove this point, and disprove yours -- huge spend has gone into data centers, but places like Wenatchee remain stubbornly not Silicon Valley.
Intel has not made Portland into SV. Austin, while a tech hub and one of the US supply chain centers for hardware, is multiple orders of magnitude less productive than SV for tech startups. Productive as in numbers of unicorns, total value creation, however you want to spin it.
What’s the advantage of moving? Maybe lower taxes and a cheaper rent.
That seems like a small price to pay compared to the hundreds of billions they’re putting into data centers.