The US military today is a bloated, inefficient force sucking up resources that would be better spent elsewhere. They’re funding blimps to watch drug smugglers at the US border, for Christ’s sake.
The populace of the US will not stand for additional military adventurism on the scale of Vietnam or Iraq. Trump started the process of withdrawing from Afghanistan and was lucky that Biden got stuck with the mess Trump made of it. It was forecast to be a broadly popular move and would have been had execution been slightly better handled.