I don't get it. I found that most POI's you can get through most of the area without breaking down a door. All I have to do is to look around to find a way in. That may mean going to the back door or through a garage or climb up a laddus that vines are growing on. Or even going to another stand alone building and jumping up a few boxes to walk across a tricky catwalk just to get in but I have done it.
Secondly, why worry about waking zombies jumping out at you and the door when you can get them to help you. If you just
knock on the door, they will
open it for you.
Then they come poring out in a nice tightly packed group were they are easily dispatched.
Just watch your back for others that might come in behind you. 00