Say it with me: San Francisco is NOT the same as the Bay Area. No, most of us wouldn't be able to afford a decent home in SF proper. But SF is just one city in a large metro area, with plenty of places you would and could want to own a home. Those of you who are 20-something: the day is coming, sooner than you'd imagine, when you're going to want to raise kids. And unless you've knocked the ball out of the park and are worth $20 million, you're not going to want to raise your kids in SF anyway.
if nobody who hasn't already made it can afford to live there what happens then?
You can afford it. It's an expensive area for sure, but there is much more to the Bay Area than "Silicon Valley" (whatever that means nowdays) and SF. I see this attitude a lot among recent "immigrants": this myopic view, apparently based on experience in other, very different metro areas, that there is One Big City and a few "suburbs." Things aren't like that here, and the reason you feel so frustrated is that you don't (yet) understand the place you live.
if nobody who hasn't already made it can afford to live there what happens then?
You can afford it. It's an expensive area for sure, but there is much more to the Bay Area than "Silicon Valley" (whatever that means nowdays) and SF. I see this attitude a lot among recent "immigrants": this myopic view, apparently based on experience in other, very different metro areas, that there is One Big City and a few "suburbs." Things aren't like that here, and the reason you feel so frustrated is that you don't (yet) understand the place you live.