I don't personally care, though unlike you I believe that the median United States citizen does benefit from our global military supremacy and that it's probably worth what we're spending to maintain that position. But the point I'm making is more banal than that: people do not like "creative destruction". We have a lot of stupid weapons programs that aren't doing anything meaningful to preserve our ability to project force; we keep spending money on them because voters in the districts they're built would freak out at the prospect of their towns being gutted. That's not a normative claim!

As is so often the case, the real, useful answer to all of this stuff is that it simply isn't up to message board nerds like us to make these calls, and our axiomatically-derived top-down economic plans are worth all the paper they're not printed on. My point is simply that there's more to military spending than a values statement about military force.