a) In my experience, lucid dreams are more memorable than normal dreams
b) You seem to assume that Whales completely forgot about the dream until they wrote this blog post, which is unlikely, because obviously they’d be thinking about it as soon as they woke up, and probably taking notes.
c) Whales already said that it hardly even constitutes evidence
It’s not rude if it’s not a social setting. If no one sees you do it, no one’s sensibilities are offended.