You can shop around quite a bit for non urgent care, and get good cash discount.
Had I self-funded with a (non-existent) nest egg, I would still be in debt over $600k. Instead, my insurance had to deal with that...
Your insurance company got the last laugh by a long shot. A typical family on insurance would pay $600,000 (between their take-home and the reduced wages paid by employers to cover insurance) in just 25 years, and that's before considering the opportunity cost of lost investments/yield.
There is no way that $600,000 is the cash price for cancer treatment (especially 20 years ago, but also today).
The average cost of cancer treatment is $150k [1], and lower with cash price + shopping.
And heart surgery is ~$60k. [1]
That's <36 months of insurance premiums according to the earlier poster.
[1] https://cost.sidecarhealth.com/ts/heart-bypass-surgery-cost-...