Huge majority of players won't attack an enemy unless he's not aware of them or they don't have greater numbers.
It's sad.
And what would you think happenned IRL ?
People have been playing this game a long time and have learned what is stupid to do and what is not.
The skill levels of player is less disparate than b4 and game much more balanced, so Rambo-ing doesn't work that often anymore. (except if you use a little bitchy high level agibuild, but still very risky)