Not if it's on tape & reel with automatic P&P, I agree. But if those boards are made in such small quantities that they're being hand-stuffed, I wouldn't be surprised to see an errant resistor somewhere. Maybe the human pick&place was distracted and picked from the wrong reel, or 100 resistors were dumped into a bulk tray and there was a 400ohm resistor on the bottom of that tray or any number of scenarios.

I've seen so many assembly errors in my time that I'm pretty sure it was something like this that happened.