You are overlooking the fact that using it "promiscuously" (such as the noted use on agricultural crops) rapidly results in mosquito resistance to DDT.
You need to do a little more research. And possibly involve non-ninny, objective DDT supporters in your reading material.
Broad application results in resistance to DDT (after killing off for REALLY cheap) but it also results in mosquitos who are resistant AVOIDING sprayed areas.
You make the call. A 'scary' application of DDT that harms nothing except mosquitos, or politically correct application of less-than effective, more expensive pesticides that result in more people dying.
For some reason, I think you'd favor the 'more people dying' approach. Does that make you feel better, or just more superior that you fall for junk science???