I don't understand wanting to play a zombie game while not slaying zombies.
Because it's supposed to be a
survival horror game, not an FPS.
And you say you "get" our point of view while talking about high-difficulty zombies is a red herring - but that's not right; you're clearly not getting it because that's not what we (or at least I) want.
I don't want people to be avoiding zombies because every individual zombie is difficult to defeat and has a high chance of killing you - I'm one of the vocal opponents of high-health bullet-sponge zombies and zombies with special abilities. I'm wanting mundane zombies in larger numbers rather than special zombies.
What I want is for people to be (mostly) avoiding zombies because there's an endless supply of them and killing them doesn't get you anything but a temporary respite. If you don't get experience or loot from them, killing zombies would gain you nothing but have a chance of losing you a bit of health or an infection if one gets a hit in, and therefore not be worth it. Avoiding them would give you the same respite, but without that chance.
In most zombie media, the theme is not killing zombies. The theme is about something else while the ever-present threat of zombies looms in the background. Check out pretty muich any zombie film and you'll see the same - the protagonists don't spend their time killing zombies for "fun" or for the sake of it (and certainly don't spend time killing zombies to go through their pockets for loose change). They try to get on with survival tasks, and generally only kill the zombies (and each individual zombie is easy to kill, but there are lots of them) when they get in the way of that.
That is what I think this game should be.
You have things to do - the things that are actually the aim of the game and are rewarded - such as surviving, hunting, scavenging, building - and the zombies get in the way of that. You have the choice of killing them: which is mostly easy on an individual level, but has a risk because one could get in a lucky blow and you could get infected or stunned; or avoiding them: which is safer, but interrupts what you're doing and might not always be possible.
But going out to kill them for experience and loot? That's not what zombie media is about, and the game shouldn't be rewarding it. As I say, it's a survival game, not an FPS.