Why is "If you don't like it, get out" perceived as a reasonable response to only a very narrow set of ideas? It seems very strange to me. Nobody says "If you don't like your neighbor owning guns, move to Canada," "If you don't like the small size of your future social security payouts, naturalize in some country with larger entitlements," or "If you want to sell cars directly to consumers rather than to dealerships, just do it in Europe," because of course it would be completely unreasonable to say these things. Instead, for most ideas, people will bother to agree or disagree, knowing that both society and the law tend to change over time based on the views of people.
I think if somebody is saying, "I fundamentally disagree with the foundation of our society", then "try someplace else" is a reasonable answer.
In this case, though, I'm not expecting anybody to move to Somalia. I'm pointing out that places with no effective social contract or taxation system are hellholes. It's not a literal recommendation; it's a reductio ad absurdum to show that the poster's views aren't thought through.
