We are not soulless. It's true that we lose a large part of our souls when turned, but Soulless, or Preternaturals as we call them, are an entirely different breed. Human, to start with, and even rarer than either vampires or werewolves.

[As for whether that is linked...]

There is still much study going on about those things. There probably is a link, but we haven't demonstrated it yet.