^This was a Goebbels quote, justifying the suffering of civilians under the bombardment..
Those bombs were sophisticated, maps being made and marked with colours to highlight the most dense population, which house types were in which blocks to optimise bombing waves for maximum damage, several stages of attacks to first get off the roofs, next wave ignite the interior, another stage with time-delayed bombs that would explode 2-12 hours later for disturbing the rescue, those 'blockbusters' rupturing lungs up to 1000 meters away, and of course booby trap ignitors making the work of defusing
difficult. Some info just of all in "The english patient", by Michael Ondaatje.
edit: when we were in Kassel recently for the
Documenta, some architect asked for a famous urban planner who had shaped the city in the last decades. I proposed Bomber Harris, which at least got a few laughs.
So you want the bombs back?

There are still plenty underground, careful estimate is 20 percent did not explode. Next, much worse stop:
Laos.