Some creatures, like dog flies, mosquitoes, yellow flies, etc, are not happy with coexisting, they will come after you. We really don't see anywhere near the amount that we used to have, God forbid we ever get there again.
You sound a lot like my grandfather that use to tell us how he had to walk to school every day in snow up to his waist when he was young.
Part of our resistance is self preserving
just what is it that you are trying to preserve?, why should we go through that again? The other part is genuine concern for our neighbors, and those of you who apparently don't have sense enough to come in out of the rain!
Its not the rain we are worried about. Its the falling droplets of Dibrom that we want avoid, but we can't because it sticks around in the environment a lot longer than a drop of rain stays on the ground before evaporating.
We really do care, and we really are telling the truth! Hard to believe?
You care about fewer flies which cause no harm to the environment. In fact, the flies are very important to the environment as they feed all kinds of other creatures. But, you don't care about poisoning innocent bystanders--both human and other creatures--to get rid of some dog flies that you can avoid personally by simply slathering yourself with poison.
I used to think a lot like you regarding minute traces of this pesticide and that fertilizer and that VOC in the paint in my house, etc. However, after getting an education in the threats posed to mankind from all the toxic poisons we throw into the air, water, ground, etc, I am much more prone to fight against unnecessary poisoning of our environment than I was 10 years ago.