Just because the markup glitches are annoying me so much:
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Maybe, but I think probably not. Market rates (a measure of local supply and demand) would be more useful.
Applying network theory, though up to a substantial fraction of total employment, it's absolute and not relative size that matters.
As of May 2019, total SF Bay Area tech employment was 835,600, an increase of 116,900 over the December 2000 dot-com peak. That increase alone would rank 4th on this midwest list.
https://www.mercurynews.com/2019/07/05/tech-jobs-soar-all-ti...
In that 835,600 Bay Area workforce, what you're going to find is both breadth and depth. Need the best, or a top-ten, or the top-ten devs in a specific skill? You'll likely find it. Need 10, or 100, or 1,000, or 10,000 bodies within a given specialty or skillset? Likely there as well, certainly more likely than elsewhere.
Want to attract remote talent? Pretty good odds. At least until housing got too rich and smoke too thick. Want to swipe local talent? Noncompetes illegal FTFW, just make a good enough offer.
It's not as if tech talent competes against non-tech talent. It doesn't. At least not for jobs. For housing and transport, yes, but that's where the SF Bay Area by and large loses.
And I'm not making the case for the midwest hubs, mostly the opposite. Unless there's some specific centre of excellence ... they're simply not going to attract talent. The body counts are likely for basic tech skills generally.
The West coast offers entertainment (VFX/CGI/gaming), search, social, ads, business automation (Oracle, Salesforce), commerce, HW & devices (Apple), and some relic defense tech, plus modest manufacturing. NYC has more ads & entertainment, and finance. DC has government, defence, and surveillance.
The midwest has ... relic manufacturing, some new manufacturing, healthcare, food & ag, a lot of back-office work, and ... not too much else that really comes to mind. Real estate? (Cratering.)
Plus a lot of tech-unfriendly legal and political legacy.
Chicago ... kind of has scale? But at 40% the size of the Bay Area's scale, even if equally complex and skilled, by Metcalf's law it would have one sixth the net value.
(There are plenty of issues with Metcalfe's law, this just illustrates how much scale effects alone might affect net prospects.)