Do you think people are not dying in Communist China for the same reasons? Industrial pollution, poor workplace safety, etc? That's not a failure of capitalism in itself.
Now, that's very different from getting a bullet to the head, or being sent to a forced labor camp to work until you die, because of your political beliefs. That's what we're talking about when we say "communism kills" - governments actively killing their own citizens due to ideology, by the tens of millions. Can you show me a capitalist country that does that?