Like I said, this is just an example of the level of laziness of the developers - they didn't care about the details, they just wanted to make something that roughly looks like a game and can be sold to the end-user. I'm purposefully complaining about the minutiae of the game in order not to complain about the glaring issues like the fact that every zombie on-screen seems to have 8 twin sisters or brothers nearby, about how the weapons are uninspiring and generic, and most of all unimportant since you could spend the majority of the game using the bat and you'd be fine, about how the challenge in the game comes from cheap tricks and sheer sizes of the swarms of zombies, about the forced platforming elements that "sometimes work" etc. etc. - there's a lot of "flaws" to talk about, I just don't feel like digging into this pile, so I picked one thing that I found completely absurd and put it in the limelight.