Private healthcare optimizes for profits and value extraction. Public healthcare optimizes (one would assume with the proper governance, oversight, and controls) for quality of life, but also for reducing costs (it's cheaper to treat your type 2 diabetes with diet and exercise before we have to start amputating appendages and you have chronic issues, for example).
Disclaimer: Medicare For All (single payer) supporter
Disclaimer: Medicare For All (single payer) supporter