The VGGW is dumb if only because it creates generalizations rather than specifics on certain games. When I think SHMUPS I'm thinking Gradius, R-TYPE, Touhou Project and Cho Aniki. I wouldn't lump them with Batman Arkham Asylum, Castlevania: LoS, Bayonetta, and Splatterhouse just because they would all fall in "Action Conflict" games.
Also people have tried applying this to music, especially with the different varieties of Metal. Terrible idea as it just muddles everything for everyone searching for specific sound/music/band etc. When I'm trying to find something by Helloween I rather not suddenly get Linkin Park or Nickelback as a result of my searching just because they are better known to the ignorant masses.