Put your car insurance on a scale of what some health care costs and you will likely get comparable costs for many things.
The ACA put limits on what health insurance can charge for many reasons, to include ensuring folks who have health issues that are not because of their behaviors or actions are not denied insurance. Plenty of folks get cancer with few or any risk factors, suffer injury that is not their fault or have conditions they were born with, and health insurance could legally deny many of them coverage before the ACA. With the good comes some bad. Welcome to the wonderful, fucked up world of the American health care system.
Sure...
The average cancer treatment costs $150,000. There is an estimated incidence of 2 million more cancer patients in 2025 estimated to cost roughly $200 billion, and 58% of those cases will be patients over 65 (covered by medicare, taxed separately with separate premiums).
There are 163 million employed Americans.
Which means treating every cancer patient in America costs an insured working American $500 per year.
If I had an entire family on Tricare YA, I'd be paying $20,000 per year in premiums. The average actual premium through employers is roughly $500-600, so that's $12,000-14k a year, of which Uncle Sam pays the employer $2-3.5k.
(sidenote: the tax credits and subsidies don't count toward profit margin reports)
I honestly don't think I've even used one year's worth of premiums on healthcare since my children were born and certainly not two. The idea behind insurance is that you pay a little over time so that you're protected from catastrophic bills, not so that you pay way more into a system that you'll ever use.
Where's the rest of the money going? Covering things that should, quite frankly, not be covered by insurance (akin to the fact that my auto insurance doesn't cover a new set of brakes).
It's impossible to have a healthy public discourse on the issue because people can't get past the fear mongering.