Forcing an immortal being to feel something entirely incomprehensible by it's own mind seems a bit more potent than a simple Jedi mind trick, I think you are drastically underestimating that ability.
Not to mention at this point in the game the Dovahkiin has to absorb something like 6 or 7 dragon souls? I mean, Alduin gets slain by a dragon slayer who absorbs dragon souls. I think you are drastically understating Alduin.
Thanks for reading,
It's still just a mental attack. It should make no difference on the effectiveness of mortal weapons on his skin.
What do Dragon Souls give you besides more shouting? Hell does anything in the gameplay indicate that your status as dragonborn gives you any tangible benefits beyond the ability speak the dragon's language on the fly? I don't think so. I mean, yeah, I may be understating Alduin, but you have to admit he never actually does anything impressive in the whole damn game. Compare him to Mehrunes Dagon in Oblivion. That guy was obviously powerful. Alduin seems less like a destroyer of worlds and more like a mildly threatening dragon with a damn good PR team.