For-profit insurance for most things isn't a scam. Insuring against the destruction of a house or car, for example is a calculated tradeoff; on average, you lose money (expected value is negative), but only a little at a time. In exchange, you get a guarantee that you won't lose an asset you can't afford to replace.
For-profit health insurance in the USA is a special sort of scam because they negotiate prices that aren't available to the public, often an order of magnitude lower.




The original comment references luxury assets like supercars. In the USA, the average adult needs a car of some sort to function in society, and often cannot afford the unplanned purchase of a reliable used car (let's call that $15K). Collision insurance that will cover most of the cost of a replacement car is a reasonable value for many people, and the insurance company doesn't have any special leverage like access to massive discounts on replacement cars (they may have access to modest discounts on repair services, but nothing like what health insurance has).
I think I made it pretty clear I understand that for-profit health insurance is a scam because providers overcharge anyone who doesn't have it to an extreme degree. That's not the case for pretty much anything else.