I totally agree with everything you mentioned and I did think about this topic as well. But the world doesn't work this way. There is Ying and Yang. It is impossible to live in a world that gives us what we want.
At the same time, war economy is a big thing in America. If US reduce their defence budget, then it will have a huge impact on livelihood of many Americans.
True, cutting down defence budget will greatly change the lives of millions of people but how can we go about it. How can we make the world we want? I still believe there is hope and that we can make the world we want. I tried to answer the question and will like you to take a look at our response https://steemit.com/ecotrain/@thegreens/philanthropy-can-t-stop-wars
Alright, I shall have a look at your post