This is pointless (Spoiler if you haven’t done the oxenfurt drunk quest)

I am just replaying the game for the first time in a few years and I thought I would do a death march run cause why not. And I just completed the oxenfurt drunk and came across this silver sword and it had +5% Exp from humans and nonhumans. It’s gonna take awhile to kill someone with it hahah. So it seems a bit pointless to me putting it on a silver sword…