Yeah - 'young girls with older dudes' is not really so much a thing in SF, though it exists.

There are 20 other reasons to be 'weary' of living in SF that are just easier to grasp, like 'rent'. Also - maybe I'm wrong but when I lived there it felt like 3 guys to every girl. At least the way social networks work because they are so tech-focused.

But materialism is what it is ... so yes, you'll get some negative aspects from having clusters of money.