I will guarantee that a massive percentage of people do in fact have a very strong emotional response to this kind of thing, but it's all just "out of sight, out of mind".
If you make people be involved in the killing of millions of baby chicks, they'll suddenly care very, very much.
Our modern world is doing thousands of thousands of utterly horrible things each and every day, we just don't get to see it or be involved, and we're way too busy making our next mortgage payment and getting the kids to school on time to notice.