This case is simple for me: I'll always follow EU/Canadian healthcare guidelines before US ones by a very long shot, unless there is an immediate problem in my local community where the US guidelines make more sense.
This isn't simple at all then. You are following one set guidelines unless you see "a problem", then you follow another set. What makes you think you can identify the problems?
But I still concur with OP. I am not an expert, and I don't know how to choose between experts with differing opinions. What I do know is that I trust certain institutions more than others.