A shoe is a shoe right? They help us perform, they protect our feet, and they look cool. True but only as a perfomance enhancer. Wearing them all day everyday is not healthy.
Shoes may look cool but that's about it. Our feet are designed to be bare, but over years of wearing shoes they become damaged and disfunctional. Many of today's running shoes and most kids shoes have a very eleveated heel. Over time this elevation shortens our heal cords and our feet won't work as designed.
Some people say they have flat feet, but unless you were born with a malformed foot your feet shouldn't be flat. A flat foot is just another way of saying a weak foot that can't hold an arch. If your shoes have always had an arch support then the muscles that hold the natrual arch in your foot have not had to do their job and now can't remember how to do it anymore.
Here's a short video of Dr. Kelly Starret talking about being barefoot.
This summer spend as much time as you can barefoot. Go run, jump and play in the yard or the park. Make your feet strong again. Sure if you're running a marathon then wear your running shoes but as often as you can let your feet feel the earth.
Now go move better.