> I think you’re wrong. But that’s irrelevant. The fact that it exists now is what gives it staying power.
You said OP was wrong to say "that has nothing to do with the Bay Area and everything to do with accidents of history" but that it's irrelevant anyway because the area has incumbency effects. Those are 2 separate things, something that you claim to be wrong but irrelevant, and something you say is true.
I agree with the second point, incumbency is a heavy weight to dislodge. But why would OP be wrong to say there's nothing intrinsic to the place that give it power?
I think OP is completely correct, the Bay Area as a place itself isn't special, it's those historical accidental decisions that now make it a hard to dislodge incumbent. But this detail is very important because if "the place" doesn't have some intrinsic power, like some unique natural resource, geography, climate, etc. that just can't be replicated elsewhere, then it can be replicated elsewhere.
In fewer words, "the place" having something unique means immovability. Incumbency just means inertia. Inertia isn't what it use to be. Detroit was the place for building cars just a few decades ago. One accidental decision, one bad policy can send an incumbent on a slow roll down. The Bay Area itself has nothing that reasonably can't be replicated elsewhere, unlike for example an oil field which you have or you don't.