The replies are addressing the reality of the interview landscape that fails to live up to your theory of how whiteboarding interviews should be.

It's all well and good that you and other "wise interviewer" commenters on HN actually grok what the point of interviews are, but you are unicorns in the landscape.

I don't think you made it to the last paragraph either:

> I know many interviewers also didn't get it, and it became just "do you know the trick to my puzzle". That pattern of failure is a good reason to deprecate white board interviews, not "I don't write on a whiteboard when i program in real life".