lmao So true.
I was working on a project in Paris and a McKinsey consultant was brought in. We all thought, oh boy, this guy is going to give us some great tips and insights and really help us direct this project (SAP, which was fairly new at the time).
This guy comes in with his fresh hair plugs (I kid you not) and starts pontificating on such a high level that any MBA student could have come up with . No detail, no experience from previous projects - just a high level overview of what we should be doing.
Finally, someone asked him what other projects he'd been on where this had been implemented and -honet-to-god - he said "Oh, we didn't actually DO the project". We all looked at each other and started laughing. He couldn't figure out why.