This is a very good example of where seed treatments have been extremely useful. Mr. Dreeshen talked about neonicotinoids. This is the issue around pollinators, and has been very controversial. Many people are coming out against neonics. In fact, Europe just announced a full ban on neonics.
The reality is that example you gave. You treat that seed, then it's put in the ground. You're not spraying over top of the crop. Your natural predators like ladybugs and many others are protected, and are able to get up to levels that help control those aphids. Not only is the seed treatment protecting that young plant from aphids and other insect pests, but as the plant grows bigger, the natural predators are able to thrive in that crop, because they haven't been sprayed over with an insecticide.