Well, it's not reusable. You're wasting a resource destined for hypersonic deterrence on some sheets of mylar that float around.
I mean, you can do that, but it would be a tremendous embarrassment.
> Well, it's not reusable
No it's not. And it's indeed very costly. But on the grand scale of things of what the US DoD spends per day as a fully loaded lifetime cost to operate a single SSN, SSBN or aircraft carrier, it's a drop in the bucket. They spend absurd amounts of funds on all sorts of things.
missiles shot from fighter jets aren't reusable either, and ships that fire those missiles are as reusable as jets