Puppies go in cages. Babies can ride on airliners. Puppies get shipped as baggage. Puppies can be boarded. Babies are helpless.
Puppies can figure out the automatic water bottle and feeder.
And the cage door. Oh yes, babies are dear and sweet and precious. I have two. I am the oldest of nine and I diapered most of those. I have 8 nieces and nephews, so far.