@Stephen45 Harlem is in Manhattan. There is no reason that a search for Manhattan listings shouldn't include it.
There already is a filter that allows guests to hone in on a specific town rather than a broad radius around it: it's called the Map. An initial search for Washington CT will display a broad radius that includes neighboring towns, but a guest who is looking specifically for your town need only take one or two seconds to zoom in on the map to remove those properties from their search results.
There are plenty of guests who prioritize convenience and location over price, and those may well be your ideal customers. However, a lot of guests choose Airbnb specifically because they're budget-minded, and are willing to stay a longer distance from the tourist attractions in order to save some money. Others yet care more about the property type than the location. When the search algorithm works well, it accounts for all of those possibilities.
The quality of a neighborhood is highly subjective, and it's really up to the guests to do their research and choose the location that suits them best. All the information they need is readily available with Google. I don't see any merit in Airbnb tipping the scales in favor of wealthier neighborhoods, as those aren't necessarily more desirable to every guest.