Why? Google does this everywhere because naming is completely arbitrary and it makes sense to be up to date with current nomenclature. Poland changed name of Kaliningrad (Russian exclave that we border) to Królewiec (what it was called when it was part of Poland) in a similar manner to troll Russians and Google updated our maps as well. Apple didn’t in either case so you have options.
Two reasons. Firstly, it's the principle of the thing - fuck Google for sucking up to Orange Shitler. Secondly, because somebody, somewhere in Google gets to deal with the endless reporting - even if all that reaction is is to have to write a script to auto-ignore that exact thing because it keeps popping up and there's nothing they can do to stop it.
Following whatever is the official version of country names and even country borders based on user location has been the thing for many years now. Google probably doesn’t care and doesn’t make the exception for the US.