Moving to a new country isn't as easy as it sounds. These people have a life in China, family, children, friends. All that can't be abandoned over night just like that. Not to mention familiarizing yourself with the regulations of the new country, finding an appropriate and cheap location to set up your farm, and physically moving your equipment from point A to point B. All that takes time and money. There is also the language barrier, cultural differences to consider, etc. Of course it's doable when someone forces you into it, but I believe that's not what the Chinese miners want to do.
And you thought that the guys who cheerfully claim miners will just move have ever done it or have at least run a business that has ever moved to form a country to a different country? For most of them they think you pack the miners in a box, you ship it to a different country, there you open Craiglist and rent with a click a warehouse, put tour phone in hotspot mode and plug the miners in a socket and that's it. If they would see the number of documents you're required to open the business, then the permits, then the contracts with the power supplier, then hiring technicians and other stuff, dealing with inspections, dealing with the IRS, hiring people to translate everything, legalize papers, and most importantly, getting in the first place in that country and obtaining residency!
Yeah, behind the keyboard it's easy, one might think it's like Farmville but in real thing are different, otherwise, we would have seen thousands of those moves already. I've spent two days with customs and clearing papers for one damn container coming directly from a manufacturer in the US and that was agricultural equipment, and I'm in the EU so a lot of already established protocols. Imagine being a foreigner in a country and receiving 2 containers with equipment worth 10 million from a company that nobody knows a thing what they are and how much is really worth and you're not able to speak a word without a translator nor are you able to make sure that translator is not screwing you up.