I'm A Banana
Potassium-Rich
For me, part of the confusion is that I don't see a reason why a monk's fists shouldn't be treated, mechanically, as swords when they want them to be. "My fists are deadly weapons" has a much better sound to it than "my firsts are deadly exceptional nonweapons."Because, ya know, there are lots of effects in the game that are obviously meant to apply only while a weapon--and not a fist--is wielded.
I've also never really seen a persuasive case that unarmed strikes-as-weapons is particularly game-breaking, but I might've just missed it.