Medical doctors are like auto-mechanics or, to make a more HN-relatable comparison, software engineers trying to debug a program. Except there's a little more schooling, a lot more rigor with boards examinations, and you don't really have the full source-code available to debug. Just like in any profession, you're going to have crappy auto-mechanics who'll just pull up the ODB-II code and perform patch-work without rigorous root-cause analysis, or have engineers who'll also perform similar patch-work to get it "good enough", you'll have the same hacks who make it through medical school. I'm with you 100% in that they're consultants offering their opinion, but I'll take your analogy a step further and say that some consultants are 27 year old kids fresh out of Wharton who can put together a pretty PowerPoint deck, and some consultants genuinely know their field.