For a couple of obvious reasons. There is little probability that Sanders’ proposals will make it any where near the floor of Congress, less that they will survive there, and none that they will make it through unchanged. It’s almost certain that the federal government can not outlaw the private insurance industry and survive the inevitable constitutional challenges. It took a constitutional amendment to outlaw the booze industry, and there is no argument that I can see under the commerce clause that would support a nationwide ban.

The ACA has established that the insurance industry can be regulated, its profits and overhead can be limited, it can be required to cover services and individuals. Creating a robust government competitor (public option) will still be a heavy political lift, but a possible one, and running the for profit insurers out of business by out competing them will face little legitimate constitutional challenge.

So I see one path to nowhere and another that can lead to what we all want, which doesn’t make me a traitor to progressive values and goals.