I honestly don't know what will happen if I lived for an extended period of time abroad and come back. It might be a reasonable backup plan, but I also don't fancy the idea to uproot my life and lose my social circle when shit hits the fan. Also what if you're divorced and have kids? The situation can quickly get complex with kids not even allowed to leave the state.

I'm not trying to say going to the US is a bad choice, just that there are very sensible reasons not to go that are often overlooked by optimism and my personal experience will always remind me of that.