God never closes a door without opening a window

I think it was Will Shakespeare who said "Does believing you're the last sane man on the planet make you crazy?"

this building has been here for quite some time now and the shop on the ground floor with a large window on a busy road has never been occupied and i recently came up with a theory as to why it is still empty. here is my theory.

it has not got a door

now i know it sounds crazy but i have walked past it allot and there is no door on this side of the building and the other side of the building is behind gates (to keep us safe from the residents or to keep the residents safe from us). 

now i would think that someone would have picked up on this problem in the plan or construction of this building or at least try to fix it in the intervening years