This is a complex topic with no tl;dr possible. If you want to be able to participate in discussions on a rational, quantitative basis then a good starting point is "The Price We Pay: What Broke American Health Care--and How to Fix It" by Marty Makary, MD. It goes into the numbers far better than I can cover in a short HN comment.
That's what all partisans think. Nonetheless you put needless scare quotes around Medicare for All, dismissed it as a "total fantasy", and, I guess, helpfully suggested I read a book by (literally!) the head of the Trump administration's FDA as a reference for "What Broke American Health Care".
If that was all done in good faith, then you're in an echo chamber and need to escape.
The quotes around "Medicare For All" were intended not to scare anyone but to identify a general set of policy proposals that have been floating around lately.
And I'm using that observation (which you keep reinforcing!) to justify my suspicion around the economic point you tried to make upthread (that, I guess, "hidden" health care "income" would increase labor's share if measured).
It's 100% clear to me that the labor/income point is spin, and to be blunt I don't believe it for an instant.