The UK health care system is an absolute joke, it's a running joke among a lot of the population. It's not free for a start, the taxes the population have to pay are eye watering. You have to wait weeks, if not months for a specialist, hospital beds are few, there is no accountability for regular fuck ups (I've been on the bad end of a horrific one).
The US system from what I have seen so far is a dream. It's cheaper and the service is top notch.
For context I've moved from the Midlands in the UK to the Research Triangle in North Carolina.