Why the universal hate for whiteboard interviews? I studied computer science at a German university and it was expected that in the exercise groups you are able

Why the universal hate for whiteboard interviews? I studied computer science at a German university and it was expected that in the exercise groups you are able to solve the exercises that you prepared on a whiteboard from the first semester on. If you did not solve it sompletely you still had to whiteboard-code the parts of the solution that you were able to and improvise the rest. For more complicated algorithms I still love to draw lots of pictures before implementing them. I can understand that people complain that they have to solve tasks (on a whiteboard) that won't have to do much with what they will do at the job. But this has nothing to do with whiteboard interviews, but with badly chosen tasks (say: data structure brainteasers) for the job interview.