All of those just increase the cost; certainly they can make things infeasible for hunter-gatherers with per capita incomes of maybe $300 a year generously. But they are of little interest to people with per capitas closer to $30,000 and who are willing to pay for tiger meat.
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.