Yes, that's the problem with using concrete iconography to represent metaphors. They are easily interpreted as being concrete.
(Iconography is hard. These days kids are probably asking about those weird icons in toolbars that they don't recognize, and moms and dads need to explain how back in the day we used quaint things like floppy disks and clipboards and stuff; soon they will have to explain about envelopes and magnifying glasses. Apple, meanwhile, just moved iCal back a decade by introducing a leather-bound framing metaphor for the entire app.)
(Iconography is hard. These days kids are probably asking about those weird icons in toolbars that they don't recognize, and moms and dads need to explain how back in the day we used quaint things like floppy disks and clipboards and stuff; soon they will have to explain about envelopes and magnifying glasses. Apple, meanwhile, just moved iCal back a decade by introducing a leather-bound framing metaphor for the entire app.)