Yep. Static games are BORING.
It's like chess. You can't lose chess by not moving. But at that point, you're not actually playing anymore.
Take a siege. IRL, a siege is nothing but a loooong waiting game, hoping one side or the other will die of starvation or disease, while tossing big rocks/cannonballs/bombs at each other to kill the time (and the occasional enemy). Nobody moves, nobody strategizes, nobody risks it all until the situation is all but resolved anyway. Boring.
But what we actually game, if we game a "siege," is the big final assault— the storming of the castle that ends the siege, one way or another, not the siege itself.
Thus, we favor aggression because it means we get to DO something that we think will produce a winning result. Sitting around doing nothing does not feel like winning. It's not game-like and it's not fun. Might as well craft a diorama.
"Attack! Attack! Attack!"
"Fortune favors the bold!"
"The enemy is there, and I mean to attack him."
"Damn the torpedoes! Full speed ahead!"
"Strike first. Strike hard. No mercy!"
"We who are about to die salute you!"
That's wargaming. It may not be tactically wise or strategically sound, but we're gonna roll the dice (literally) and charge the trenches. Because *that's* what's fun.