It should matter to us when the inevitable killing of the animal (along with the environmental harm incurred by raising it) take place without any benefit to us. Our society has decided those terrible costs are worth it in exchange for bacon and hot dogs. When these animals are raised and wasted they'll have suffered for nothing and the rest of us will suffer for it.
Yes but it's a huge waste of resources that only the farmer is paying for. They paid to house, feed, innoculate, etc those pigs. Killing them to burn them realizes no profit for them.
Although we are conducting a perverted form of nature, there is nothing wrong with eating animals. The problem is the poor treatment of the animals and eating too much meat in general.
When you abuse animals for nothing then you are basically killing for sport.
I don't agree. If humans needed to eat animals to survive then it might be reasonable to argue that killing animals for any reason other than food is wrong. Because then you could argue that you are inflicting the minimal possible amount of suffering.
But since humans don't need to eat animals, I don't see much difference ethnically between killing them because they taste good vs for no reason. If anything, that seems to be more about welfare of the human psyche than welfare of the animals.