I'm just speaking from our own KD's experience, but in Green, we love to button play. Especially considering the set up you choose, an extended hostile period can really change the landscape of an upcoming war. The problem we have faced many times during past ages and 2 times already this age is that if you out maneuver your previously agreed upon opponent during the pre-war hostile period...they can change their minds and back out of war. And that is a MAJOR problem with this game.
We lost out on 2 potential wars because of that and the only recourse we got was 1 free land and 1 free sci wave. But it wasted a total of about 2 weeks time for us. We almost lost a 3rd war, but we baited them just enough by doing a full learn wave into their fort.... That caused major damage to us on an opening wave and forced the war to last an entire week before we won. But...to go to those length just to 1) get a war and 2) win...is exhausting.
I have to agree that many KDs in the "war tier" are extremely scared of the pre-war hostile period or don't treat it seriously enough. The only KD we had an enjoyable hostile period with was Divinity because they actually button played with us within a 24 hour agreed hostile period. I don't see why we can't all wars be like that :/. But then again..I'm only speaking from my KD's experiences over the ages.