400,000 people would have died regardless. America is the don't tread on me country. People don't take kindly to the government telling them what to do. Hillary wouldn't have contained the virus any better. Sure, she could have passed a mask mandate but there's no guarantee that would have worked.
California vs Florida is the classic example. California had the most draconian shutdown and even today outdoor dining is shut. What did that make people do? Simple, they just met each other inside other homes. Covid spread like wildfire. CA is an epicenter today in America. Florida? They relied on the common sense approach with things being open. Still, people being people, not all wore masks and hung out. Covid spread. Adjusted on a proportionate basis, both CA and FL ended up being similar in outcomes for Covid.
One thing that many people ignore in America is that not all health issues are genetic. Genes you can't control, but PLENTY of health issues in this country are due to lifestyle choices: lack of exercise and a terrible diet. We are an extremely unhealthy country and all that hurts when it comes to a virus attacking your body.