In most civilised countries we actually care so much that we chose to spend a substantial part of our public budget on helping injured humans as a collective.
We care so much now that we are funding programs that put them out of their misery (1), a misery created by our civilized system and compassion communities!
Among the many kind things we did for our first dog, the kindest thing was making and carrying out the decision to euthanize her to spare her what was likely to be months of additional suffering.
That that is taboo for humans in many places is something that I hope continues to evolve. It shouldn't be illegal to treat a family member with the same compassion that we can treat our pets.
(1) https://www.justice.gc.ca/eng/cj-jp/ad-am/bk-di.html