True. But it's not nearly so asymmetrical as most people seem to believe. Most interviewers aren't great at interviewing and know it. They're usually open – surprisingly open – to changes that will help them conduct a more reliable interview.
If I'm interviewing you, it means that we already think you are worth talking to. I don't want to waste either my time or yours. If what I'm asking you to do makes you uncomfortable, TELL ME! I can think of the last two people I interviewed who gave me a series of immediate "I don't know..." answers to a bunch of questions. They're happily (I hope!) working here now because we changed the interviews to go down productive paths to find out what they do know instead of beating our heads against a wall!