Exactly! It's that a person living in mundanity (if I may abuse the word mundane) still has all that going on in their mind. Vivid and raw imagery. If anything, it is uplifting, so I understand Zach's frustration that it is being perceived as only depressing.
What I mean is that Zach's comic does give you the impression that the person *does not* have anything going through their mind as they drone through life like robots. I think it *is* depressing. It only ceases being depressive when it makes you think and (eventually) realize you are not droning through your life. Which is not always true. Many times I do drive to work barely noticing what is going on besides not ramming other cars.
On the other hand, *because* of it, I've been paying more attention on what I see during the day.
I prefer it the way Zach did, without spelling out that it *can* be that way, but doesn't *need* to be. On the other hand, it puzzles me that *he* didn't see it as depressing.