Just read an interesting article.

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Practical Paradoxes to Live By, and Other Notes on the Illusion of Failure

by Brian Van der Horst

Einstein flunked algebra. Marilyn Monroe never thought she was beautiful. Freud was uncomfortable looking people in the eye. Carl Rogers could not stand being told what to do. Did Virgina Satir ever marry and have children? Fritz Perls was often inconsistant. Will Schutz got bored in seminars. Richard Bandler and John Grinder can establish and maintain rapport with anyone, except...1

When the gods have important messages to deliver, it seems they often chose rather flawed messengers. Maybe it's their way of trying to insure that we humans won't confuse the message with the messenger.
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For the rest of it go:
The Law of Requisite Contrariety