Part of the thing to keep in mind is the Japanese introduction to RPGs, which was through the Wizardry games. Which is to say a dungeon delve with no story that handled combat in the most reductive way imaginable.

This colors almost every part of the idea of RPGs in Japan, and is more or less why they have so much focus on turn-based team fights in JRPGs.

So when you have a game that is fundamentally about someone living in an rpg world, they're living in a world where the numbers are by far the biggest part of the game.