Most of what the druid needs is in the PHB in the back. Are you actually going to claim the MM is DM because it might contain something a class can use? The DMG is supposed to contain player options so are you going to sit there and claim it's not supposed to be DM only?
I'm saying exactly what I said... that your assertion that the MM is only for DM use is incorrect... no more and no less. The DMG contains campaign options... big difference.