The traditional technical interview process is designed to ferret out a candidate's weaknesses whereas the process should be designed to find a candidate's strengths.
No one can possibly master all of the arcana of today's technology landscape, let alone bring that mastery to bear on a problem under pressure and with no tools other than a whiteboard.
Under those circumstances, everyone can make anyone look like an idiot.
The fundamental problem with the traditional technical interview process is that it is based on a chain of inference that seems reasonable but is in fact deeply flawed. That chain goes something like this: