"What things are they seeing in practice that it is not safe to share in public?"
-My guess would be (to) successful cases and or the detox phase, that I can imagine must be hard for a doc to go public with, either way they may be attacked by the medical system and media.
"but his comments make me wonder if these guys have to cover their derrieres on this Iodine thing, don't want to bring too much attention to it and loose their licenses........"
Seems as if they are staying low, probably to avoid trouble.