Why must the development of technology must be monitored following WWII?

World War II awakened many people around the world to the destructive potential of technology. This was most famously and tragically illustrated by the destruction wrought by the atomic bombs dropped by the United States on the Japanese cities of Hiroshima and Nagasaki. It was clear, with the development of atomic weapons, that human beings had developed technology capable of wiping out the human race itself.The use of air power more generally had devastated Japan and Germany as well, and Nazi scientists had developed rockets capable of delivering bombs to faraway targets. So this conflict illustrated that sophisticated technology carried terrible dangers.
The new military technology was fostered by cooperation between scientists and the state. Governments spent a great deal of money on developing weapons and other technologies, and this contributed to the rise of what President Dwight Eisenhower would famously call the "military-industrial complex." He meant that governments would spend more and more on weapons, and that there was a risk that the motive for all this spending was industry profits more than national security or the maintenance of peace. Indeed, the rapid buildup of weapons in both the United States and the Soviet Union during the Cold War seemed to confirm his concerns. So the advent of highly destructive and very expensive technologies during World War II posed a major challenge for the human race in the immediate aftermath of the war and beyond.
https://www.history.com/this-day-in-history/eisenhower-warns-of-military-industrial-complex