Sometimes getting rid of ossified organizations is a good thing, but there are probably better ways than high explosives.
We brought in many new ideas - both in business and in government - most of which persist in some form today - and the Japanese in many cases have taken those ideas, refined them mightily, infused them with some Japanese culture - and re-exported them to us.
The best example of this that I can think of, is Kaizen - the various scientific management techniques exported to Japan by W. Edwards Deming - which was re-exported to us as Kaizen.
Plenty of places are bombed into oblivion. What makes the rebirth is the rebuilding. The marshalling of public resources. You can replicate that without the bombs with a public-spending initiative.
Bombs would solve that, but come with a host of other... issues.
Beyond just the “whose money is buying?” is that the latter costs you current production while the bombed-out scenario has no current production to forego.
Indeed, something like a Marshall Plan!
> You can replicate that without the bombs with a public-spending initiative.
You can, but the challenge isn't in the implementation as much as gathering the political will to do that. Since the New Deal and WWII, that has rarely happened in the US, and only recently: The ACA, the 2021 Infrastructure Bill and the Inflation Reduction Act. All of those barely had enough support to pass and both are at risk if there is a significant shift in power.
Maybe this would also be an effective way of clearing out NIMBYs blocking the routes for high-speed rail lines?