Local buying power is the answer. 80€ is (sadly) the current AAA-title price when brand new in Europe, but it makes no sense to try to get the equivalent amount in other regions, because the available money for leisure spending is less than what you would be asking for. Since an additional copy of a digital game costs you nearly nothing, you are maximizing profits by offering the product in every market at the price point people are willing to pay for a AAA game.

This has for example lead to issues years back where a lot of EU users were registering accounts in Turkey, where the local pricing was a lot cheaper for central european users budgets.