They did decide to bomb Kyoto, for exactly that reason. The secretary of war, Henry Stimson, objected to it, due to cultural significance, and convinced Truman to choose an alternate, which was Nagasaki.
Yes, I know this and it was part of my point. If "cultural significance" was part of determining bombing sites, then we know "maximum concrete, visceral impact" was clearly not the only goal.
https://www.bbc.com/news/world-asia-33755182