But you're making about a dozen assumptions in that little scenario. That all the citizens in UHC countries are about the same (false), that quality is uniform across the country in, say, France and in all other countries across the globe (false - it's no more likely to be uniform there as it is here), that the UHC is a one size fits all plan (false almost everywhere), and the $billionaires get the same care as the poor (false), that UHC in the U.S. will be one size fits all (almost surely false), with Jamie Dimon getting the same care as the grocery store clerk up the street (false), and much more.
And even if you accept your assumptions, most of them false or likely false, then it's still an inherent conclusion that the country - legislators and the POTUS - should be content with a health care system that fails something like 20% of the population pre-ACA (who were uninsured), and something like half the country if we exclude those non-seniors who were already on government plans, like the VA and Medicaid and SCHIP pre-ACA, just so long as it works very well for the minority of the country with a good healthcare plan at work.