IDK, part of me feels like there's too high of a chance of Aurora being confused for a ICBM reentry. And similarly, the same interceptor missiles used for hypersonic payloads like that would be effective against it. And the countries that don't have nukes and anti-nuke infrastructure, we just fly drones over with relative impunity. So I legitimately don't see the niche where they make more sense than something else that's public.

That being said, the Space Shuttle didn't really make sense on it's face either and we built it, so I could def be wrong.