The problem with this mentality is you're essentially outing yourself as a "sexual predator of animals" to those who see it as unlawful or downright despicable. Not to mention doing so could garner you some legal repercussions.
When we are in a safe space like Zooville, sure, I guess it's cool. Anywhere else has too many inherent risks.
Bestiality and (insert many other topics along these lines) are still EXTREMELY taboo. Just like LGBTq was as little as 15 years ago. I'm sure with time, and more people turning to realize that there are worse things that happen than sex with animals, it'll become less taboo.
My philosophy is as many others have said, and it's like the phrase "what happens in Las Vegas stays in Las Vegas." There just aren't enough people (yet) to turn away the stigma against bestiality and such acts.
Even if 99% of people took the utmost care of the animal first, before themselves, there would still be insane backlash if you were caught or even proud of yourself.
This isn't to say that one day, bestiality won't be a more accepted or "normal" topic, but we gotta get there first and we aren't there yet.