Entropy Stew wrote:

The metagame is the way it is because it's the Nash equilibrium of positioning tradeoffs. Breaking it creates an imbalance for both teams, and making that imbalance work to your team's advantage requires strategy beyond what a group of five random people is usually capable of exerting. You'll see a team break it far more often at the beginner and pro level than anywhere else because the beginners don't know what they're doing, and because the pros do.