Earlier quoted context omitted.
Not that I'm trying to make you feel worse about it: In the UK we pay less per capita in taxes toward healthcare than you do in the US (or at least did last I added up the numbers - Medicare and Medicaid alone added up to a higher per capita cost than the NHS), and if we do want private health insurance, which here is basically "queue skip insurance", it costs a fraction of in the US because they only need to provide…
In the UK you also pay insane taxes and your _median_ citizen in the UK has far less disposable income after all expenses including healthcare, according to OECD metrics. In software engineering specifically, I'd make a third of my current income in the UK. I'd much rather make 3x as much in the US and still get free healthcare through my employer, with shorter waiting lists and better treatment outcomes than the NHS…
Nothing stops you from choosing extra insurance in the UK too if you believe you need that level of cover.
The only reason you're comparing it to the NHS instead of an equivalently expensive UK private healthcare plan is that the NHS provides good enough universal coverage that most people don't feel the need for more.
But the US equivalent would be to compare it with Medicare and Medicaid.