It should be! When I was a complete newbie at AWS my first question was why do you have to pick a region, I thought the whole point was you didn't have to worry about that stuff
But yeah, that's pretty hard and there are other reasons customers might want to explicitly choose the region.
They make lawyers happy and they stop intelligence services to access the associated resources.
For example, no one would even consider accessing data from a European region without the right paperwork.