If you could look at your eyelid really really close, you'd see all of these indentations and super fine lines which make eyeshadow blending really really difficult.
The great Wave by Hokusai is so iconic image, I mean, if you can actually pick up with a hand, you can take the portals on the texture on the paper, and you have indentation of that.
Most bird strikes are with smaller types of birds that might just cause dents, but if the bird is large enough and is ingested into an engine, that can cause serious failure like the Miracle on the Hudson.
So if you have like even a little bit of rust or dent, like, resin, under the stamper itself, it'll show through in a visual non-conformance and actually can have playback issues on it.
We know that rocks weather here on Earth too and that meteorites have made some considerable dents over the years, but today Earth looks reasonably fresh and new without widespread craters.