> their entire military doctrine revolves around defending themselves from us.
I mean, Russia invades and China taunts its neighbors pretty regularly, so clearly their military is focused on more than defense from the US (as if we have any interest in an offensive war against them in the first place). The US military keeps those countries in check, so of course they focus on how they can “defend” against our military. The extent to which Russia and China are scheming against the US military is the extent to which they aren’t invading their neighbors, which is precisely the value the US military provides, and indeed that Russia is invading Ukraine is a failure of the US government to respond firmly to previous invasions (no, not direct military conflict with Russia).
The idea that the US or the world can enjoy meaningful peace while withdrawing from the global theater is dangerously naive. There’s no world in which we pull back without oppressive dictatorships rushing to fill the void.