The Czar of health-care in the US today is a brain-worm addled, drug-addicted, vaccine-denying, conspiracy mongering, incompetent jackass. And the overall current administration has shown itself to be hostile to basically anyone who isn't a cis-gendered, white, heterosexual, Christian male.
How many of us really trust these people to make good decisions regarding our health-care? A position that they (or their delegates) would find themselves in if we "nationalize health care".
I think this is a classic example of an idea that sounds good on paper, but doesn't survive contact with reality.