In 1783, the volcano Laki started erupting on the island of Iceland. For eight months, it spewed huge quantities of sulfuric gasses into the atmosphere. These gasses killed crops and poisoned the grass, killing the livestock who ate it. About 25% of the population of Iceland died in the resulting famine.
Most sources put the annual worldwide number of homicides at around 420,000, with a further 140,000 violent deaths from international or intranational conflict which is pretty close to 1% of all deaths, without even starting the debate on whether to count, for example, firearm suicides, or killings in self-defense.
This is not a bad overview from 2016, but the 0.04% stat is so far from reality than any source for homicides, deaths from conflict and terrorism, or violent death will refute it instantly.
The rest of the developed world isn't far away with many countries in Europe, Australia and NZ all comfortably under 0.10%, but Russia, Africa and the Americas (regardless of levels of development) let the side down. Topically for 2020, 0.04% of US deaths are at the hands of the police.
These arguments are always somewhat silly. It's kind of like saying that a murderer didn't kill his victim, the bullet did. Or that the bullet didn't kill him, it was the loss of blood. Etc..
"Five stages of the HOA".
Despite that, lives saved to lives taken ratio must be one of the highest for helicopters among all modes of transport.