It might work better in cultures with a more developed eat-out culture like in Asia.
For lunch we'd hike over the hill into little Italy, and there was a decent sandwich shop we'd get lunch at. (Freddy's) Before the hill there was a small asian couple who ran a small shop, they made a good mushroom stew. No idea if they're still in business, though, or what their place was called.
Neither were restaurants … you weren't going to be finding a seat at least inside. There's plenty of seating around SF though, if you know where to look.
¹although Google thinks NB is actually a bit W of where we were.
I'd figure Google Maps, being less explicitly targeted to tourists, would be likely to include reviews and pricing data relative to a local mentality, which might not be so willing to spend tourist prices.
It's easier, I suppose, if you're doing a walking/public transit oriented trip and are in a city-- if you don't like what you see when you close in, just go 50 metres further down the street.
Unfortunately I have been ripped in SE Asia, and moreso in Central America, where prices were almost never displayed, and I was charged US prices for almost everything.
You've been lucky.
In my experiences with traveling to a great number of countries and cities... yes, it pretty much is.
Taking any kind of "easiest path" tourism is basically full of rip-offs in every hotel, restaurant, and tour, no matter where you are.
It takes effort to plan a genuinely enjoyable trip full of rich experiences that isn't ripping you off.
Also, it doesn't seem to be a population map at all -- that distribution is quite different:
https://www.mdpi.com/land/land-02-00252/article_deploy/html/...