Easy. Without Adolf Hitler, World War II never would have happened and millions of lives would be saved. But that might also mean that electronic computers and atomic bombs were not invented, or if they were invented, they were invented decades later.
Homeschooled students often do better than public school students and even private school students. I would like to see a community where there are no taxpayer-funded public schools. I would call such a community a "homeschool haven". Those communities could spend more time and money on stocking libraries, fixing infrastructure, sprucing up rec centers and parks, and buying new/better equipment for first responders. Or they could lower property tax rates by 50-80% and encourage new residents and businesses to move in.
Thank you for saying that pills are not the answer.
I believe spending time outside is beneficial. Unfortunately, too many parents are too scared to let their kids play outside out of fear they'll get hurt. But there are two positive aspects to getting hurt that most people don't think about:
1. When you get physically hurt, you learn firsthand how fragile your body is, and that you're not indestructible, which are good lessons to learn before you become old enough to drive a car.
2. When something causes you physical pain, you learn to treat it with respect.