unless its something like a carpenter hammer, using a blunt object to smash would cause a lot of fatigue, and fast. i've picked up a crowbar and swung it around to get the feel of it. it's heavy, even the smaller ones. Machetes are really light and i could hack with something like that and faster, than i could with a blunt object. i'm not saying they are perfect though, a lot of the ones out there arent the best quality. usually meant for light use, but the heavy duty ones truly made with purpose can do real damage. Deadliest Warrior: Somali Pirates vs. Medellin Cartel, the Medellin pulled out a high quality machete and were able to lop off an arm with ease during their testing with one swing as they hacked away at it. a weapon like that is a keeper.
The thing about a crowbar is this. It had way more than one use for it. Machetes, have two uses. Hacking bodies, or hacking brush. Im going to carry a crowbar, because I can also use it as a entry tool to get into abandoned houses, and buildings. In a pinch it could be used grappling hook to climb a wall(though I would need to be desperate to do that) it can be used as a hammer, pry bar when working on a vehicle. There are literally thousands of things I could use a crowbar for.
In the army they always hammered home what they called positive purchase when it comes to carrying a tool. If it has more than a couple uses. It buys the effort, and space in your pack. Its earning its keep so to speak. In the army we never cut down brush when we would hump through the bush, so for me edged weapons have the purpose of hacking bodies. 1 purchase doesnt buy space in my pack. I can carry way more useful things with that weight.
Shotguns in the post apocalyptic world. I own two shotguns my self. I would use them as a close range, secondary weapon if needed. The shells pack weight and a pain in the ass to reload a shotgun if your not the best at loading. ( In which I'm not a master ). If your going to own a shotgun just for zed purposes. Get a pump action and don't have two one shots like me. Rifles are your primary gun in a zed world.
But one thing a shotgun does have is stopping power. You can kill about everything with a shotgun. One shot and a zed is done. ( If shot right ). But it doesn't have reload speed. and weight and recoil are also factors in having a shotgun.
But for zeds It's more of a close range weapon. Not a long distance. I would use it if my rifle jammed or I had no ammo. :/