My stomach rarely growls when I'm hungry, and when it does it's only a few times on an interval of a few minutes. Not ideal for being able to tell and therefore make decisions. In contrast, I've never experienced blurred vision from exhaustion or "warping" due to stress.
At the end of the day, these HUD elements make up for the fact that it's not possible to simulate a sense of an empty stomach that you physically feel through a computer, or the sense of exhaustion when you've been awake too long. You can display that information clearly with a UI element, or in an obscured way with other cues, but they'll all be artificial.
I liked the follow-up paragraph:
I'm not sure that qualifies as a "rethinking" of the genre: other survival games have relied on sounds and visual effects to give players information about their character's survival status. It's also, honestly, not my favorite approach: effects like blurred vision can just wind up being annoying to deal with if they're overdone. None of those effects are shown in the trailer, so I guess we'll see how Verdant handles it.