Nothing "wrong" with it. It's just that it goes contrary to most people's instincts. They know that safety is outside, they don't necessarily know that the parking garage is. Logic says it should be - as it is concrete, has few combustibles (aside from the vehicles), is structurally sound and has at least one big ass exit to the outside. People in a crisis situation will default to their safest knowledge not stop and think things all the way through.