You mean, he has no prosecutable/enforceable obligations, so lenders can't do anything if he doesn't follow his contract and pay his real debt in a pseudonymous currency. I agree though, he will prove that he's a big man if he pays back, and his lies can be forgiven at that point.

Your perspective also seems to conflict with the ethic of reciprocity. I would like to live in a world where promises matter, and so do you.

In addition to that, if you don't have a contractual obligation to me when you publicly promise something, then when is there a contractual obligation ever in the Bitcoin world? The highest extent we "sign" documents is clicking a checkbox, and even that is rare.