Dimirag wrote:I think its a "import error"
I thought that too at first, but looking at od&d Blackmoor supplement II and ad&d 1e it's pretty clear that it was originally intended to be weaponless only; not a bad thing to extend to some weapons, but this took me by surprise.
Mystics in BECMI had no such stun ability. However, BECMI did introduce the concept of weapons that can stun at greater "mastery", but "stun" in that case was more like disarming or fumbling the foe (not paralyzing).
Dimirag wrote:but as BF does not use weapon proficiencies I would rule that he can use those moves after some levels.
There is a distinction between proficiency and specialization; they are easily confused amongst players. In 1e using a weapon you were proficient with actually meant that you would NOT take a penalty (you would not get any bonuses.) And it's also not clear that a Monk is a subclass of any particular core class; some say subclass of thief, some subclass of cleric, fighter? not exactly. So I agree that specialization was probably not the intended meaning.
Thank you for feedback.