It doesn't win wars, but it provides the necessary equipment for carnage and stalemates all over the globe. Remember war is just a pretext, the objective is always profit, so as long as a lost war is very profitable it's a success in their books.
IMO the last real war the US participated in and helped to win was WW2 giving it a massive ego. And even then it was drawn in via Pearl Harbor. After that it was a bunch of "wars" it fabricated to satisfy its ego with various (often poor) outcomes.
I don't think it's fair to characterise the Cold War was an ego thing. Global authoritarian communism wouldn't have been a good time for the vast majority.
If everyone has the same conclusion, how is it an argument? Nobody thinks the US won in Iran except the morons that started it. Maybe bigOil feels like its a win as their profits are soaring???
If it leads to the US staying away from future wars then it in one sense it could be a win - for regular Americans. But I doubt that very much. The US state is a machine geared to war and exploitation in too many ways. More of the good people in the US need to be aware of this - it's painfully obvious to the recipients of US foreign policy.
I like to read Bret Devereaux (from the frequently HN posted https://acoup.blog/) takes on this in his Bluesky (https://bsky.app/profile/bretdevereaux.bsky.social)