I'm a rural southerner, vegans are an object of curiosity here. Also, arm-wrestling is just a common pastime in my community. One of my favorite matches was against a 230lb Korean guy, college student visiting town. Definitely overall stronger than me, but he just couldn't put the torque up before he wore himself out.

One interesting thing I've noted is that people who were raised eating meat and doing farm chores are much stronger than vegans who work out in a typical fashion. I arm-wrestled a monk who doesn't eat meat, but was raised on a farm, and he had a lot more endurance than a typical plant-based person.

FYI, arm wrestling is a test of technique moreso than strength. And IMO you are generally correct that people who actually work with their muscles tend to have more functional strength (endurance, efficiency, and versatility) than people who train in gyms and have very pretty muscles that aren't terrible efficient in demanding real world situations (lots of explosive strength but only optimized for very specific trained movements). Still, this has nothing to do with what type of protein one consumes.

I basically answered all of this here: https://news.ycombinator.com/item?id=39379157