Coming from a country that has this, there should be caution: it gets more affordable, but you get what you pay for. In my country of origin, you get a partially-paid-for ride to the emergency room, where you pay for things like casts, non-ward rooms, dental care out of pocket. There is no prescription coverage. There is no optometry coverage. I would wait significant chunks of a year for procedures and diagnostics.…
1) In the USA, one must be pretty well situated to get the quality of healthcare you describe. MANY people go without prescriptions, and get inadequate care already.
2) If you add up what we pay in health insurance premiums plus employer contributions, especially if you have a family, we're generally in the same league of paycheck-subtraction as a European country with universal healthcare.
So while I agree with your overall point that it could end up worse than where we started, I don't think thats a guaranteed outcome.