Come to think of it, at one point in the not-too-distant past I did see a fair few new-ish comments with zero points instead of one, where I couldn't see anything about the comment that was objectionable enough to be worth downvoting.
I don't remember what my response to those was - probably I just figured that someone was having a bad day or read something into the comment that I wasn't seeing or something.
disclaimer: I have no idea and tldr