That's certainly a fair viewpoint (and reflected together in the spec version 802.11-1999), but the interesting thing about this rebrand is the Wi-Fi Alliance taking a step back, realizing that the individual specs don't matter to consumers and as a consumer brand trying to break away from just using the spec names/versions.

From that perspective A, B, and G were all sold as three separate things to consumers, so it makes sense to count all three.