It was a rhetorical question. For what it's worth, in my mind I was including Spanish Flu (because picking the last 100 years would have been a tad unfair), but also the large numbers who killed by Mao, Stalin and others through starvation, or other methods short of deliberate execution. It doesn't really matter which number is larger, the point is that it's a horrifying large number on both sides.
I also think it is unlikely we would now have RNA vaccines, or many other forms of advanced medicine, if free debate of scientific ideas was not allowed. In short, I'm trying to make the point that while freedom is messy, and life under a benevolent dictator would be better in some ways in theory, but in practice it tends not to work out that way.
Finally, don't imagine for one moment that controlling discussion would serve the interests of scientific truth. It would serve the interests of money, and of power. Of course the same is true for a lot of what is published today, but at least we have a diversity of viewpoints where everyone can compete for a slice of attention. What you are proposing risks extinguishing the search for truth, not protecting it.