No matter how strong you are, you're not going to be able to protect yourself by yourself.
This is a naive as one is capable of being. The entire article is devoted to what a wonderful world it would be without nuclear weapons and the US should lead the way. Let's see if I have this right: If the US unilaterally disarms, then everyone will like us and countries like Iran and North Korea (not to mention Russia and China) will just play along and we'll be one happy, cosmically harmonious global family?
Yeah, how'd that work out for Europe 70 years ago?
There is evil in the world and those who wish to do us harm. Disarming ourselves without another means of defending against nuclear weapons is just plain stupid.