When the times required it amendments have been made to the US constitution, do you really think that (a constitutional amendment) is the only way to include healthcare in the list of things the federal government has the right to promote as part of the general welfare?
Yes.
The Constitution specifies what the US federal government can do, and also sets explicit limits that the federal government must not go beyond without a Constitutional amendment. These limits are only effective if we choose to follow them, and I think we should be uniform in the way we follow them. Suppose for some unimaginable reason we decided we needed to ban a particularly dangerous religion. Should we let a pesky thing like needing to repeal the First Amendment stop us? What about needing to fight a war, is there really time to get a declaration of war from congress like the Constitution requires?
The Constitution is over 200 years old now. Some of the things in the original document, such as the 3/5ths clause for slaves, have no place in today's society. The people who wrote this document knew that it would some day be centuries out of date, and they added an amendment process to provide a legal way to update it with the times.
Following the Constitution has become seriously out of favor in recent years. In the 20s, we banned alcohol, and the nation at that time felt it necessary to do so through a Constitutional amendment. For some reason today we ban all kinds of substances, yet have made no such amendments supporting these things. Declarations of war have gone seriously out of fashion, to the best of my knowledge, the last declared war the US fought was World War II, over 50 years ago. Many of the things regarding Guantanamo Bay and the PATRIOT act strike me as Constitutionally questionable, at best.
I don't really care if the rest of the world is screaming past me. I care that we follow the laws that we the people agreed to be governed by, and that if they need to be extended or otherwise modified, that we do so by those very same laws.
Out of curiosity, where would you go? Is there really anywhere you'd like the politics of better than the US, even with a Democrat-controlled House, Senate and Presidency?
If you have a procedure with 10 parameters, you probably missed some.