You're still buying into their paradigm wherein they've created endless needless complexity to confuse the market. The entire point is that this complexity needs to be nipped in the bud with singular prices for each significant line item, just as every other industry operates.
The equivalent would be when you're hungry and need to buy food at the grocery store, asking how you can manage that since you are going to have to pay for the food cost, the shelf space cost, the trucking cost, the refrigeration cost, the cashier, the bagger, etc. In actuality, the grocery store comes up with a single price that they're comfortable selling an item of food for, puts in on the shelf, and you can take it or leave it at that price.
The only way the medical industry can get away with their ridiculous bullshit is seemingly through a bunch of laws they bought whereby they can saddle people with debt without actually having done the work of forming a contract. Hence why you can visit a single business, and then end up getting a slew of bills from arbitrary providers that you had no relationship to. That simply cannot happen in other industries, where the only basis for billing is having formed a contract.
The equivalent for cancer is they'd lay out several treatment options (as they're already doing while ignoring prices), listing the price for each, the price and recommended frequency for followup monitoring, etc. You could then ask different providers for how much their treatment cost. Ideally the places administering treatment would be unbundled from the doctors doing the diagnosis, and the diagnosing doctors' office could give you a list of competing treatment providers. I know I'm hand waving away a lot of details here, but the whole point is that the intrinsic complexity of the problem needs to be modeled around cost, rather than treating it as an afterthought, creating a bunch of accidental complexity that ignores cost, then trying to manage it after the fact.
(And note that this is still orthogonal to who is ultimately paying, whether legitimate insurance to pool risk, subsidies for those who can't pay, etc. It's easiest to see what the current system is lacking when you look at things that "insurance" doesn't cover. For example a hospital stay, I would guess most people here would pay $100/night to have a single room rather than a shared room with a roommate always setting off their bed alarm etc. But there's simply no way to express that to the system currently, creating a zero-sum environment of scarcity, rather than a positive sum environment of abundance)