If that were true you can compare back to when we didn't spend money on fighting terrorism. Has it changed much? No not really. Terrorism is not a (major) problem in the world if looking at major causes of human loss of life.
Also, I didn’t argue that; I just pointed out that “few people die today, so we shouldn’t spend much money fighting it” isn’t a valid argument because the truth could be “few people die today because we spend so much money fighting it”.