Have you any experience with the elderly and the fake trade rags that get mailed to them? Usually they have a price on the cover, 5.95, spouting all the miracle snake oil cures. In their pages are pictures of doctors, at first glance it looks legit. Somewhere hidden in fine print is the 'these statements are not meant to treat, are not approved, etc etc'. Just enough legalese to not run foul of the FDA. Or all those roll on headache commercials that cure everything.
Now I know the FDA is far from good, just look at the horrors of aspartame getting passed because of political ties. However the thought of no central licensing agent and the mass confusion it would cause is actually kinda scary. We'd have snake oil flooding the market worse than it is.
It's one of those 'in theory it's great, in practice it's another matter'.
On another point, if the threat of lawsuits wasn't so prevalent in the medical field price savings could be drastic. Of course changing the legal industry on top of the health care just makes it all the more challenging.