Factory farming and animal agriculture are completely unnecessary animal suffering. They only exist because human want muh treats.
Humans existing is completely unnecessary, what’s your point? Necessity is in the eye of the beholder.
“But muh vegan Youtubers tho!”
They make their money doing the thing that the study says it’s healthy, and get sick, they stop doing the thing that the study says is healthy, and get better. Sure, it’s anecdotal, but there is clearly something the study didn’t consider, these people have all the time and resources and access to nutritionists, if anyone could do it and not get sick, if it was as easy as the study claimed, they could do it. They literally have a profit motive to do so, and yet they couldn’t do it.