Vocabulary creates tone and “the industrial animal torture industries” is far from a neutral phrase. If you can’t read tone it’s a skill issue.

They are asking why industrial animal torture is not upsetting compared to killing a pet dog because they are equivocating the two.

“Pet” is not purely a label, it is the social relationship between pets and their families. That is what is so upsetting to people. Equivocating would make more sense if she had a dog-meat farm, because those aren’t pets. Horrible, but only as horrible as any other blood farm that raises animals for slaughter. Killing pets, though, is clearly different. That’s killing family. People are going to get upset about it.