This is a game, therefore it's suppose to be fun for all.
It's a competitive game. In most peoples' minds, this means it is their job to try as hard as possible to win, within the rules of the game. Did you play any sports competitively? Did you not take scoring opportunities you were presented with to ensure your opponents were having fun? If you did throw those scoring opportunities, did your teammates throw you a sock party afterwards?
Why use 40-50 guys were 10-12 will do?
Because it virtually ensures success, and that is the goal people are trying to accomplish, to succeed in taking the base/getting the kills.
I liked the fishing analogy. You can either do it the sporting way with lures and bait and poles, or you could drop sticks of dynamite in the water.
If there were no law against it, people would use TNT to fish with a lot more often than they do. Like it or not, a good number of people will take the surest path to success they are allowed.
Wiley.