Also because our health is already predisposed to being garbage compared to other countries thanks to our obesity crisis. Of course while that should be treated at the source like the UK is doing by e.g. not allowing junk food companies to advertize directly to kids, the healthcare system has a huge role to play in that too.
Need physical therapy? Get fucked. Can't exercise because of a chronic, unhealed injury? Fucked. Mental health disorder keeping you from being active and eating well? Mega fucked. Eating disorder? Fucked. Quality of life destroyed by treatable obesity complications? Fucked. Can't afford a variety of healthy foods because you're trapped in medical debt? Fucked. Need medical intervention for weight loss? Fucked. Have a GI disorder and need to see a dietitian to plan a diet? Fucked.
Treating it at the source is absolutely crucial, but for people already caught in the whirlpool of obesity, privatized healthcare is categorically failing them.