[pfdietz]

Let's turn that around: how do you feel about extending the laws about murder to statistical deaths?

Because that would be completely impractical. It would cause the economy to cease functioning. Statistical deaths and individual murders are fundamentally different things.

There's a fuzzy boundary between the two (as effects are concentrated on smaller and smaller numbers of people) but that doesn't mean there's no difference.

Even with individual murders, there are gradations depending on intention and mental state. Manslaughter and first degree murder are different crimes, even if the number of dead bodies is the same.