Cigna Sued over Algorithm Used to Deny Coverage to Thousands of Patients
forbes.com
forbes.com
That doesn't mean everybody necessarily wants it to be the case but the USG is more constrained in what it can do compared to a corporation. A law that restricts what the Government can do very rarely applies to what a corporation can do.
The US system is bad. The problem is that healthy people don't care and sick people are less likely to have the means to battle private corporations. So, it is better for the {evil corp} to get sued every so many years and pay some fines vs paying for the care.