Based on not having a realistic choice. The only person I personally know to successfully pull it off is an acquaintance that's rich by local standards, doesn't work, spends a lot of time sourcing and cooking it, and also eating it. He needs to eat more for same energy. It's so involved that most of his life revolves around it. It takes a good bit out of his time. The rest of the people from that friend group couldn't afford it, couldn't afford spending the money, couldn't afford spending the extra time on it.

I personally wouldn't eat meat if I had a good alternative. I rarely do, I eat it for health related reasons, considering my setup.