I’m okay with a little chromatic aberration and vignette.
Why? It's literally something that pro camera tools have added in-software fixes for to remove them. Like - if you're simulating an old JVC vidicon tube camera and wanting to make something specifically look like an image capture device from a specific time, I get it, but otherwise, it just seems like a way to hide the fact that your graphics aren't quite hitting the realism mark and you think if you obscure it a bit, players will think it looks more "real."
Agreed on the "shifting focus" part for vignetting specifically - but everything else... outside of specifically tailoring to fit a particular "aesthetic" I think are crutches that are generally used to obscure an overall graphical presentation in order to work in a similar way to how squinting your eyes works.
I agree that highly stylized games like "Bodycam..."
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...use things like a specific kind of grain, noise, distortion, aberration, etc. to create a highly appealing visual aesthetic designed to match an actual low-fidelity police body camera, but Battlefield and CoD have much less excuse in my book.
The camera aesthetic stuff only makes sense on things like the AC-130 killstreak in CoD where you're emulating the on-aircraft cameras actually used in the real deal.