That conclusion doesn't follow. Ethical perspectives often evolve over time.
being a vegan isn't an "ethical perspective" it's someone being a dumb-ass and ignoring the fact that human bodies are designed to eat meat
but
also
what i said was accurate
a hundred years ago, the people in charge of slaughtering food-animals would have been totally horrified by the cruelty-to-animals videos that the crazy-cult-groups now use to try to convert Americans into becoming vegans,
humans have been eating meat for millions of years and the severe types of cruelty appearing in the vids didn't even start happening till a couple of decades ago,
a hundred years ago the people who ate meat every single meal would have killed people over the cruelty in the vids and knowing about the cruelty would not have changed anybodies diet,
a hundred years ago,
nobody in charge of slaughtering food-animals could have ever gotten away with anyone finding out about the cruelty that's in these vids because they would have been lynched by the other people in charge of slaughtering food-animals
also
at this point i should point out that I'm describing people who are walking around with these big battery-operated video-playing-screens that look like big flat-screen-TVs
then they walk around showing these animal-abuse vids on a loop to random people outside the hotel every time the Downtown-Dallas Sheraton hotel has a convention to try to convince random Anime-fest goers to become vegans
as far as i know they can't do this shit anywhere outside of America because the tactic wouldn't work
people in Europe or where-ever would just realize and point out that "animal cruelty" has absolutely nothing to do with a person's diet
and people outside of America would either just ignore or beat-up the vegan-cult-members
and as far as i know the vids I'm describing are vids that nobody outside of America has ever even seen