This puts it best. Zoophillia and eating meat (what I assume they mean) are not morally comparable. Eating animals was a necessity for a long time, that has continued into modern life (because our brains are wired to LOVE meat). Nobody actually enjoys the process of killing animals, I’m sure if you had a butcher shop where you slaughtered live animals at the counter people would be horrified. We just like meat, we are literally wired to, and the process to obtain it is cruel and ugly.

Zoophillia is completely different, there is zero material gain from it, and it’s done purely for the joy of the human initiating it.