Earlier quoted context omitted.
The sort of people who can set aside a couple tens of thousands of dollars are also the sort of people who probably have good health insurance through their job. Generally, the US's healthcare problems _mostly_ impact low to middle income people, and they usually can't just magic up 30k or so.
100%. I have known a couple of people that did some form of "medical tourism", mostly for expensive dental work. In both cases they did some form of tech contract work as a sole proprietorship and bought their own health insurance (not through a partner). The overlap of people who can save up thousands of dollars for treatment abroad and have poor health insurance is probably not too large.
Cost of travel to Thailand < savings on medical procedures (with equivalent or better outcomes)