Yep. The puppy analogy falls apart when you've given the same puppy to 10,000 people. All of them could pay the vet bill separately, but we instinctively recoil

Yep. The puppy analogy falls apart when you've given the same puppy to 10,000 people. All of them could pay the vet bill separately, but we instinctively recoil from that as being horribly inefficient (and personally inconvenient) when it's possible for just the one puppy-giver to pay it.