Because men are better than women at sports.
You're welcome.
Joking aside, I hear this from my wife all the time. She makes a lot of her own clothes and accessories as well as designing them. Pockets are must in all things.
She just finished a new bag for dog walking. It is her third version. It is basically a cross-body reticule pod. Meaning it is a collection of pockets of various sizes and styles to hold everything from her phone, glasses, keys, doggie treats, poopie bags, lip balm, money and I'm sure a couple other things I'm forgetting. Multiple rings of multiple shapes for securing.
I asked her how much she would charge to make another one and she said it would be something over €300, but even then she probably wouldn't do it. But she will put the pattern for sale on her website. Pockets rule!