Do you like having blisters in between your toes? Do you enjoy having nasty, cracked heels?
And god forbid you have to run for your life...please, if a murderer is ever chasing you and you're wearing these stupid "shoes", just kick them off. You're better off barefoot.
*edit* I also think that people who wear these shoes are trashy and lazy but that's just my personal opinion. Everything else I said about them is fact.