However China has to start somewhere. If they go all in on renewable energy along with their political changes, then that has the potential to make it an even more attractive landing spot, due both to increased quality of life and to interesting new job opportunities in that field.
(This is actually the outcome I'm hoping for, as I'm seeing global warming as the largest threat to humanity right now, and a large-scale challenge to big oil from China is the only thing that'd work before it's too late. The only politically viable way that's going to happen is if it helps win some other zero-sum game such as the competition for worldwide talent. If it works out that way, then it would eventually force the US to reconsider its oil alliances too and maybe we'd all be okay. This is all just somewhat stream-of-consciousness though.)
There is a very big food problem... in the US.
Also, there is a very annoying problem with people of other colors in the West. I do not want to have to tell my kids to be afraid of "some people" when I take the subway, but I also do not want them to be unsafe. This is another reason to avoid the West for raising kids. (Just one last: in Japan, parents are NOT allowed to take their kids to school, kids have to go by themselves. In the West this would be considered irresponsible. I want my kids to be happy, free and safe.)
My point was about food safety, not nutrition. To some extent I can control how healthily my children eat by choosing what to feed them. But while in the US we can be fairly confident that the food and drugs they get are safe, that is less true in China, due in part to some recent food safety scandals like [0]. When we travel to China, there are certain things (like infant formula) that we bring with us rather than buy there. We also bring things like vitamins to my in-laws because they ask us to.
There are downsides obviously, but food, safety, and housekeeping help are on the upside, especially with kids.