What's the Point?

In my travels (or adventures), I sometimes come across stuffs that defy logic. Like this padlocked and chained wooden door, for instance. Can someone tell me the market price for a good sturdy door nowadays that the owner secures it thoroughly  even though the building it's attached to has no walls?

Front/Outside

Back/Inside

Angelina's note: Am confused. The human mind is too complicated. purrr....meow!