No, it isn't. It's about helping the team win games. Who cares if Drogba only scored 12 last season (he had 11 assists, too--the highest of any striker), when Chelsea out-score every other club, including Arsenal and the Glams with their BiG nAmE strikers?
Shrek and Horseface scored 37 of the Glam's 72 goals. Henry scored 27 of Arsenal's 68. If 30-45% of your goals are coming from one player, then your season practically depends on that player's fitness and each game depends a lot on one player's form. Much better to play a system that spreads the chances around. It's much easier to replace a striker that can jump well and pass a bit than it is to replace one who can score 20+ goals a season. Same goes for any player. The system is king.