I carry some of the things in my bag (tarp, small fishing kit, tent stakes and such) because I don't care to put together a separate "urban" bag and "woods" bag. My bag contains items for both scenarios.
Like someone else stated, the contents of your bag is just "stuff". It's what you can achieve with that stuff that makes the difference.
For instance, I carry an ammo can full of tools in my Jeep. Between myself and several close friends, we have gotten vehicles out of the woods with missing or broken axleshafts, driveshafts, wheels/tires, shocks, springs, you name it. I've seen a vehicle driven out of the woods missing an entire axle.
We don't have a 10' long x 5' high Snap-On box worth of tools, but most professional mechanics couldn't accomplish what we "engineer" out in the woods.