Remember that the general welfare clause is in exact parallel to "the common defense". DDWW said that the legal difference is because "the common defense" was specified in the Constitution but a category corresponding to healthcare was not. The two places "the common defense" is specified, so is "the general welfare".
I suggest you re-read the clause:
While I agree that the clause doesn't grant authority to do anything in the name of general welfare, it does indeed grant the authority to raise and spend funds for the general welfare of the country. By your logic, there is no authority for the common defense of the people, just the states, and that's clearly not so.
Yes, I know--but thanks for stating the obvious. I specifically gave you the reason I cited that: to show the similarity in meaning between the words "health" and "welfare".
ETA: But most impotantly, re-read DDWW's post that I was responding to. I think you're trying to make it out that I'm saying something more than I am. I'm merely claiming that DDWW's rationale is wrong.