Actual healthcare delivery is a growing field because boomers are getting old and dying and advances in health care mean that people that would otherwise die (eg people with cancers) are now receiving treatments that keep them alive.

Note that this is a Good Thing.

The issue with US (and privatized) healthcare delivery is that there is an incentive (by insurers) to deny treatment, as well as an incentive for healthcare suppliers (hospitals, doctors) to over-deliver treatment, as well as incentives to use more expensive solutions.

Demand in healthcare is inelastic, no one is ever "too healthy".

Supply is always insufficient, so there needs to be a mechanism to resolve that.

In the US, that mechanism is money, or the cost of insurance etc to provide a restriction on demand.

In universal healthcare, that mechanism is a combination of subsidizing medications based on results and waiting lists for limited supplies, prioritized by need (eg surgeries).