When you have a minimalist capsule wardrobe, you spend considerably less time and energy on all these things, which you can then spend on more important things.
Think about the time you spend shopping, trying on, returning, exchanging, tailoring, laundering, organizing, purging, and deciding what to wear. When you have a minimalist capsule wardrobe, you spend considerably less time and energy on all these things, which you can then spend on more important things.