Yes. War is a racket. But so is taxes and a lot of other things. Another quote is that war is an extension of politics when diplomacy fails. Some people don't speak diplomacy. They speak intimidation and murder if you don't submit to their will. Asking them nicely to stop doesn't work.
What I mean by the bumper sticker comment is that regardless of how bad everyone wants peace, some people want to enslave, dominate, and murder others en masse.
How do you propose to stop that from happening by 'demanding peace'?
Worked out great for Neville Chamberlain.