Yes, and it's also reinforced by the Bay Area's geography and climate.
The history of the Bay Area has been one of successive migrations, each of which comes seeking wealth & fortune and each of which is ultimately displaced by the next as it taps out the economic boom that started it. It started with the gold rush (1848-1855). Just as that was winding down, the railroads (1863-1890) took off, leading to widespread immigration first of white Americans fleeing the Civil War and devastation there and then of Chinese and other Asians. The 1890s and 1900s were a rough couple decades for San Francisco, between endemic corruption, a bubonic plague outbreak, and the 1906 earthquake and fire, but from 1910-1930 you had a large migration of poor white farmers ("Okies") fleeing economic consolidation and environmental destruction in the plains. From 1930-1945 you had the huge U.S. military buildup and a large migration of largely black workers; SF was both an important port and shipbuilding center. After the war Fred Terman made sure that Stanford and associated companies got a large share of the Cold War DARPA dollars; this funded HP, Shockley, Fairchild, Varian, Lockheed, Hendy Ironworks (now Northrop Grumman), Moffett Field, and most of the first-gen Silicon Valley companies. This branched off into consumer semiconductor & electronics manufacturing in the 60s & 70s, with Intel, National Semiconductor, TI, Seagate, Apple, etc. While this was going on, you had the countercultural revolution up in SF. Then you had the PC revolution in the 80s, then the dot-com boom in the 90s, and then the Internet, mobile, and sharing-economy booms of the 2000s & 2010s. Now you have a significant blockchain & AI presence up in SF. All of these are fueled by a mass migration of young people from more disadvantaged areas of U.S. like the Midwest & South, as well as a large influx of Chinese & Indian immigrants.
It's always been a place where people come from far away to capitalize on the zeitgeist, and if you're not capitalizing on the zeitgeist (or supplying shovels to those who are), you're marginalized. When the zeitgeist turns, everybody who made their money in the previous iteration looks to invest in the next one. If you call the next one wrong, you fade away into obscurity.