But if the druid is always using wildshape or battlefield control magic they hardly need a weapon, though being OP it might have wildshape bonuses and/or enhancement to magic
Actually it would almost certainly be far better for one than the other, depending on its particular flavour of OP as each weapon
As GM I'd accept that argument from a person with a smart enough player, but not from one whose intelligence attracts penalties and not from one whose background is from an island or at sea or a city rat
In some settings I might have monsters like trolls only in some parts of the world, so you're out of luck if you're not from those places unless you read a lot (and if my group is prone to metagaming, change the monster's weakness)