I don't think anyone here is saying DDT should be completely banned. If used properly and at low levels it can be completely safe. Despite what selective research you may read, DDT does have health concerns. The fact is there are safer ways to control mosquito populations. Further, when was the last time we had a malaria outbreak in the US? I don't know how we survived without DDT /sarcasm.
I agree the decision to ban DDT in the US was probably emotive and political but the widespread use in agriculture was certainly problematic. DDT would not have been effective and it would have cause some environmental damage if we had continued to salt the earth with it.