Insurance certainly costs far too much money, but that's missing the forest for the trees. Insurance is the reason that the market is non-functional and broken. The misdirection inherent in an insurance-centric pricing regime is what's made it impossible for anyone to ever know the actual out-of-pocket cost of anything, and getting that is the first part of getting a functioning market established.
We need to stop looking at the individual level and "What can we eek out of people who don't qualify for Medicaid?", and look to the macro-scale effects. Insurance is the wrong model for routine services (indeed, insurance usually functions as a discount program rather than true insurance) and people shouldn't be able to sell it for that purpose due to the debilitating effects it has on the marketplace.
Docs and pharamacies should be up front about their real prices. Today, even people who are "posting prices" can't be up front about it because posted prices function as high anchors for insurance negotiations. This is why you can often get a massive "cash discount" if you call about a bill that you're going to self-pay. That's what they'd really like to charge you, but if they don't start out charging the sticker price they quoted the insurer, they're in big trouble.
For a market to work, there must be a real pricing dynamic where the consumer can be reasonably well informed about the actual total cost and vote with their feet. Hyperinflated 300% prices, necessitated by insurer demands for large discounts, don't count, they're still not real numbers. Markets simply cannot work without meaningful and accessible pricing information.
The medical system will remain a disaster until we can break this dynamic around pricing, and the only way to do that is to fundamentally change the way that medical insurance works, either by nationalizing insurance and/or medicine so that the government writes all the checks and price becomes only indirectly relevant to the public anyway, or by imposing law that mandates price transparency and seriously limits what "medical insurance" and "discount programs" can do, so that we don't immediately descend back into this.
IMO this is a textbook case of a market screaming for good regulation. Ideally we would identify the malicious actors (primarily insurers), develop rules and systems that minimize their ability to operate, and allow the free flow of commerce to handle everything else. "Nationalize it" is a clear power grab, but lacking any willingness to do anything else about such a breathtakingly large economic and humanitarian issue, even that would be better than "let's just keep crossing our fingers".
It's so sad that the level of conservative dialogue is not "let's find a good minimalist intervention that will get this market working again" but rather "Did someone say 'MURICA wasn't the best at something?!"