A hard audience is also a loyal one
The same skepticism that makes San Francisco expensive to reach makes it valuable once you are through. People who research carefully do not switch on a whim, and they are unusually willing to recommend something that survived their own scrutiny.
That changes the maths on awareness work. The first six months look slow next to a market where a coupon buys a customer. The following two years do not.
Most local competitors give up early
Because the early numbers look poor, a lot of businesses here abandon awareness spending and retreat to bidding on the same handful of high intent search terms as everyone else.
That leaves the top of the funnel quiet and the bottom of it brutally expensive. Staying in the quiet part is uncomfortable for two quarters and cheap for the rest of the time.
Being cited beats being seen
This audience asks other people and, increasingly, asks an assistant that summarises the web. Both of those return sources rather than advertisements.
Content that plainly answers a real question is what gets quoted in those answers. It is the closest thing to awareness you cannot be outbid for.