> If I drive my child in a small car instead of a massive truck, is this statistical negligence?

No, I'd say the responsibility there lies on the car company execs making F-250s ever-bigger to the point they have worse forward visibility than a M1 Abrams tank. https://www.iihs.org/news/detail/vehicles-with-higher-more-v...

> What about the trees outside my home and their hundred pound limbs — if one breaks it will almost certainly be fatal.

If you don't maintain your trees and they kill your neighbor or damage their house, you'll often be on the hook for it, yes. Insurance won't cover you if it was negligence.

> why does an infant refused a vaccine constitute murder but 11 days earlier in the womb its life had no value?

Virtually zero abortions happen 11 days before term. When they do, they're medical emergencies, not voluntary.

https://commons.wikimedia.org/wiki/File:US_abortion_by_gesta...