The shots don’t exactly call attention to themselves. It’s almost an easter egg.
Which is why if it is actually integral to someone’s story then it should have actually been featured more prominently than a small easter egg. I just feel it causes unnecessary confusion. But that’s just me.
It’s there to be noticed if you’re looking in the right spot. (And they were shown twice in the drawer.) I didn’t even catch Luke wasn’t leaving footprints in the salt until the second viewing.