On the human side: the problem is the producers (of meat/dairy) hide the torturous aspects from consumers by abstracting it away. We go to the store and get some chicken breast, steaks, or pork ribs, but we don’t do ANY of the work to prepare that animal. It’s prepared by underpaid/exploited foreign labor.
In contrast, even if a wolf killed a bunch of sheep for sheer pleasure: they are doing the killing, which takes energy. And if the sheep has a herd of rams with them the wolves might come out bloody themselves.
NOTE: I’m talking about factory farms and large scale production. There are farms which follow good, holistic procedures—where the farmers do care about the well-being of the animals and the cycle of life, even when animals are slaughtered.