Yeah, the essential and irreplaceable nature of healthcare is one reason for it to be a public service.
Another reason that public healthcare is much better than private is that most healthcare services are "Credence Goods" where the person receiving the care cannot determine the value/quality of the service received.
Example: If someone gets hit by a car and needs surgery, how would they determine the surgery was the best possible surgery? If it was unsuccessful was it due to the lack of skill of the doctor, or was it because the accident was too severe and could not be solved by any living doctor on the planet?
If the value of goods cannot be determined, it is hard to fit it into economic models for competitive markets.
This is on top of the other obvious benefits:
- single payer systems driving down total costs for everyone
- maintaining standards across clinics
- a healthy population is more productive, pays more taxes, drives innovation, etc.
- a healthy person is more likely to contribute money into the economy vs. take money out of the economy (through welfare, disability, etc.) -- this is definitely not to say that welfare and disability benefits should be reduced in favour of healthcare, they are both needed. Most people would prefer to actually get treatment and get back on their feet than not get treated and be on EI or welfare until they die young.
Here is an Unlearning Economics video that goes into this more.
Yeah they are all super obvious, but I repeat them all even if I think most people would already know them by now.
Leave no opportunity for intentional deception (ex. Doug Ford) or innocent misunderstanding (people who just don't follow this stuff).