Considered “friendly” by Israel

Not by Israel, by the system in place for nuclear warheads.

The good system will magically discern…

The system doesn’t have to, the people do. And they’re quite good at it.

If you’re willing to spend the money…

You are absolutely right that resources would have to be moved around. This system, however, is not owned or controlled by a single country. How those resources would get moved around would be way above my pay grade