Out of curiosity: why is CostCo so expensive?

P/E 2025 CostCo: 49x

P/E 2025 NVidia: 49x

I know it's not the same industry, and so on. But why is CostCo so expensive?

The only thing that can rationnaly justify a high P/E is high growth. There's no way CostCo get the sheer organic growth of NVidia in the future.

I'm no stock picker, that's why I'm asking. It seems to be an american specificity that you wouldn't find in European markets, for instance.