I did not downvote, and did not see the post until after it had been redacted. Hairyfigment's description is pretty good. To that, I would add that I recognize the passage from Jaynes that you're quoting, and I do understand why it seems particularly valuable. However, a while after reading it, or without ever having read that particular passage, I do have to say that the section you quoted is much less useful, powerful, whatever, without the remainder of the passage.

It also could have been downvoted by the substantial number of users on less wrong who just generally dislike the present state of discussion on quantum physics.