alt Hacker NewsIf you can not win a war because your population is unwilling to bear the cost, then you are still unable to win (that is in fact a very typical way for a war to end).
Nobody is disputing the fact that the US spends more money on arms than anyone else and has the shiniest of toys as a result, but "winning" in war is about effecting the outcomes that you want, not about whether your weapon systems are superior.
The US military has clearly failed to deliver the outcome that Americans wanted in many recent conflicts (Vietnam, Taliban); counting those wars as "lost" makes a lot of sense.
One of the reasons to do a war is to simply show the enemy that you are able and crazy enough to go to war with them over whatever grievances you had. This is called strategic deterrence.
You are making the folly of thinking of war like lawsuits, where one side wins and the other side loses, and the losing side goes home with nothing. This is not so.
If you're walking home from work and some person tries to mug you, even if they are unsuccessful, that will permanently change your behavior as if they had successfully robbed you anyway. Maybe you'll change your route. Maybe you won't walk and drive instead.