I really don't understand the over fixation on Silicon Valley.I think the rest of your comment is elaboration on this theme. You don't understand, mainly because your views are distorted. A couple of examples to give you the idea:
it attracts engineers who are more likely to jump to the next hot startup
Untrue. Certainly you can find those types, but the Bay Area is full of people who are willing to stick with a company they believe in. It's just that you're focussing on smaller, more questionable startups. They're not the majority.
This makes bumfuck Ohio[1] a better place if retaining talent is important.
But you are much less likely to find talented engineers who just happen to live in Bumfuck, Ohio. Nerds tend to flock, because flocking is important. Startups need an ecosystem.
Nor does it have the jealousy driven culture where every 4th person has an overpriced show off car, etc.
I've been a Bay Area professional for 20 years, have worked at multiple startups, and have yet to see "every 4th person" with a show-off car. I think I know two or three people with super-expensive cars. Most people in the Bay Area who are involved in startups are serious about business and technology. That's why we have so many major success stories, and smaller ones you probably haven't heard of — for example, have you heard of Workday? It's a SaaS company started by Dave Duffield, who founded and ran PeopleSoft previously. Workday is growing like a weed, not because of wild infusions of crazy venture cash, but because it's a good service and the customer base is expanding.
The reason everyone focuses on the Valley? People are focused on venture capital, not building profitable businesses.
Wholly untrue. The entire focus is on building successful, profitable businesses, not on raking in VC money. That's why Heroku, Salesforce (which bought Heroku), Evernote, Dropbox, and — since history matters — Apple, Oracle, and even HP are here. I could make a much bigger list of successful and up-and-coming startups, but you can do the research if you actually are interested.
You're focused on trivial companies and outlying flakey people. They're not the majority.