I think it's more of a convenience thing, to be honest. We're not attuned to be able to see where we're going via sonar, sense magnetic fields, etc. On the oth

I think it's more of a convenience thing, to be honest. We're not attuned to be able to see where we're going via sonar, sense magnetic fields, etc. On the other hand, we're great at learning, and at adapting to when a sense is lost or added. And the vibration really won't be that significant, it only has to be enough to get some feedback from it.