Using a purely numerical system to determine whether or not a game is "good" is a heavily flawed process in itself, but people complaining about 7/10 being bad put pressure on reviewers. I won't even go into the matter of death threats and sackings over scores and comments. Reviewers work in a symbiotic relationship with the games industry and with gamers themselves -- there is a sickness born of all three that affects the shambles that is numerical scoring systems.