That doesn't say that the author thinks everyone should've seen it, or should care. Just that it's a work that almost noone sees while it's just there in plain

That doesn't say that the author thinks everyone should've seen it, or should care. Just that it's a work that almost noone sees while it's just there in plain sight. And the author finds it intriguing knowing about a thing that many have seen, but don't know they have.