The UK guy’s heart valve replacement wasn’t “free”—he paid for it over decades through taxes and National Insurance (average ~£1,500–£1,800/year per person). Everyone chips in for the NHS pot that covers big procedures.
In the US, we choose our insurance plan, set our deductible and out-of-pocket max, and control our costs. Either way, we all pay for major care—one spreads it across a lifetime via taxes, the other lets us pick the plan that fits. No free lunch, just different ways to foot the bill.