There is a surprising amount of movie- and TV show-related tourism. The general public wants to visit the places they’ve seen in their media. The advent of Google Maps, et al, plus cheap travel (pre-COVID), makes that trivially easy for the common Everyman, not just geo-geeks.
This whole thread is about places that are mostly real. And the liberties taken in geographical plausiblity.
Anyhow, if the producers of a show use actual locations as-is with their real names, they are causing, sure as sunrise, a steady flow of gawkers to that street corner or train station or whatever. Which is a bit impolite. By munging up the names, faking the maps, etc., they prevent these mass pilgrimages.