My point is that war is the worst thing that humans can engage in, and that the prevailing sentiment is that constant war is an immutable status-quo, and hence it's okay, there's nothing we can do except downvoting those fucking negativists.

I think the folks disagreeing with you maybe haven't spent much time in war. Almost certainly some in harsh skirmishes, but I reckon a few Nam, Korea and WWII vets would at least entertain your position on the subject. Pretty much every meta variation of terror has surfaced or has the potential to surface in war. Parts of Ukraine, I think, easily represent hell on Earth, for both sides.

Edit: I will go a bit further..

I consider Military the greatest power on Earth. It's sacred, necessary. But those who abuse its power commit, in my view, the greatest of sins. I don't mean the soldiers who fight, but those making the decisions of who they fight. The soldiers do their job, often willingly. And they are the ones who face the consequences. To betray them by corruption is the ultimate betrayal. War is a power that, I think, should be reserved for situations with no other option. Mercenaries not considered.

War is not nearly the worst thing. Not even in the top 10.