This whole discussion is within the context of trackers specifically, not the mainstream definition of “chiptune” which can refer to any music, made using whatever, that have some bleeps and bloops mixed in.
The mainstream definition also includes music that isn’t tracker music, which isn’t what we’re talking about, and hence, it’s not the right term to be using.
Bringing up the word in its general meaning within a discussion about tracker music, is even more confusing and unhelpful, because in the context of trackers, the word chiptune refers to a specific type of tracker music.