Jeff Carlsen
Adventurer
Not actually true.
You see, the fleshy humanoid has SKIN, and MUSCLE, which spread out the damage from the bludgeoning weapon, making it less likely to shatter bones.
Without those things getting in the way, and spreading out the energy, bones are actually a lot easier to shatter (hard to cut, but easy to shatter).
I thought about that, but concluded that it was in error.
When a human takes a hit with a mace, his muscle and skin do absorb damage, meaning his bones are less likely to shatter. But damage doesn't just mean bone fractures. That skin and flesh is essential to the health of a human, so absorbing the damage doesn't do the human a lick of good. In the meantime, a skeleton functions even when his bones aren't connected to one another, so a few bones cracking and breaking aren't the threat to the skeleton that they would be to a human. Stopping a skeleton requires demolishing its bones until even magic can't hold them together.
So, what extra bone-smashing a mace might do is rendered inconsequential due to the practical effectiveness of that bone smashing, while skin and flesh absorbing a blow isn't an advantage at all.