War's for oil are pointless for the US, when we have enough domestic supply to be completely energy and petro-chem independent, and were for a time under Trump.
Respectfully disagree; the only tool the US has left to maintain its broken global economic system is the petro-dollar. The Bush invasions were about trying to control the global oil supply so the US could dictate to China, which needs massive amounts of oil to function, what the global rules are going to be. You're viewing America as simply a country that could cut loose from the world supply system and be fine, when in reality the US system is only functional because it rules the world through access to finance and oil...a control that is slipping away.
That has basically been the US policy need since the 1930s when the Depression revealed that the US system could not survive without major redistribution of wealth and power unless it turned the entire world into an economic colony. In the run up to the war, during it, and after WW2 the entire point of US foreign policy was maintaining economic domination over the globe and prevent rivals from operating outside the US run system.
How did the United States appoint itself as the world's supreme military power? Stephen Wertheim delves into the archives of the U.S. foreign policy elite to trace armed dominance to its origin in World War II. He shows how officials and intellectuals suddenly chose to embrace perpetual...
www.hup.harvard.edu
Hence the Bretton Woods system (abandoned in the 1970s due to the limitations of the gold standard and US finance issues during Vietnam) and the Petro-dollar effectively replace that and the gold standard:
en.wikipedia.org
We examine the rise of petrodollars and their influence on the USD as a global reserve currency.
www.investopedia.com
Effectively the value of the dollar is pegged to the value of global oil. All the more important due to Peak Oil being reached in the US in the 1970s:
en.wikipedia.org
Things have improved since of course due to new technologies and prices making more marginal sources economically viable, but that contributed to the huge problems of oil shortages in the 1970s; OPEC made its move strategically.