Different standards, too. I've become used to US/Canada restaurant standards for food when I go out to eat. Everytime I leave the country I'm thoroughly impressed by the quality and taste. Still, I'll be somewhere like Osaka and read reviews online. Locals will rate a place 3 stars and stay they could make it at home, it's nothing special. Place that outclass 90% of US restaurants averaging 3.5 stars, while at home there's pig slop getting rates 4.8.
Cultural differences impact what a person believes is the correct answer.