> The US does not just send B2 bombers without knowing it's going to work.
I'm old enough to remember when we (the US) ran this exact playbook, except the last letter was 'q' instead of 'n'.
Spoiler: the B-2 played a part in both of the big wars we lost in the last couple of decades. The problem hinges on the definition of "work": yes, the bombs hit what they are aimed at. No, that does not result in operational success without a coherent theory of victory.