Now this is a good point, unlike most of the rest of the inane comments.
If you think about it, though, there are very few gorillas left. The loss of a single healthy adult male gorilla is a devastating blow. The loss of a small child in a world teeming with people? Not really much of a problem. The loss of a healthy young adult vigorously contributing to society is a bit of a problem. The loss of a troubled teenager who has been committing crimes since he was 11 isn’t much of a problem. The loss of a healthy adult bull with prize qualities of an extremely rare breed is a problem.
It doesn’t have anything to do with sentience or species; it’s all about rarity and value. Unfortunately, humans are not rare and human children are not valuable except to their parents even when viewed through a human-centric lens. I’m sure your Disney-esque sensibilities will be offended by these statements.