In reality... the door to your home has a lock on it, right? Think about the materials and effort that went into the design, manufacture, installation, and ongoing operation of that lock. Are those "wasted"? After all, it doesn't actually produce anything new! In fact, its entire purpose is to sit there and impede the flow of resources... which would otherwise flow towards people who think they can utilize them more effectively...
For a more naturalistic example, what about your body's immune system? A big portion of your body's "budget" is invested in mechanisms for finding and destroying other organisms, ones which have done quite a bit of their own work to build themselves up. Do you honestly weigh the Staphylococcus economy equally to your own?
At no point did he say it was disproportionate to the nation's wealth (or dirt-supply.)
Rather, his post argues it shouldn't happen at all.
But, we can assume:
1. That Petersellers has grown to adulthood with a remarkably naive understanding of human nature.
2. Believes that the industrial and design capacities of modern nations are such that we could conjure effective weapons faster than a strike could be effectively delivered.
3. That they meant their statement in a somewhat more bound form.
Since 1 & 2 seem either unlikely to be held, or to be held by a mind that hasn't been convinced by the other arguments / observations it would have come across to the contrary, the latter seems the most useful context to interpret their remarks in. The others would either be mistaken assumptions or remove the point of talking to them.
In your analogy, it's clear to me that the US is better suited for that status than any of the other realistic candidates.
My point was not that no-one could justify an extreme of door locks but that I could not. If someone wants to try and justify an extreme of door locks, they're welcome to do so. But merely noting that we all do some thing, or that someone has to have done the most of it, is not such a justification even by analogy.
Additionally, your analogies don't really fit with the behavior of the US and how it utilizes its vast military resources. We aren't acting defensively, we are instead acting very aggressively and overthrowing governments who we perceive to be our enemy.
Maybe my initial statement wasn't very clear: I'm not for a 100% reduction in military costs, as I think it can provide an insurance benefit when used defensively. But in the context of the discussion, regarding the funneling of trillions of dollars into the machine: that level of spending is incredibly wasteful, unnecessary and even harmful when you consider the negative side effects that have arisen from our brazen use of these resources.