Egres attempts to conflate two separate statements into one:
Quote:
Unarmed Strike: A successful blow, typically dealing nonlethal damage, from a character attacking without weapons. A monk can deal lethal damage with an unarmed strike, but others deal nonlethal damage.
There is nothing there that says an Unarmed Strike must cause damage, only that it typically causes nonlethal damage, and that monks can deal lethal damage. These are separate clauses, and attempting to make them into one is not a strict reading. There is no limitations on the Unarmed Strike in these regards, only the characteristic it typically causes nonlethal damage - meaning that the majority of Unarmed Strikes cause nonlethal damage. If you're reading that as "always causes damage" then you're reading it incorrectly, because no such clause exists.