Goldeneyes

So this is a pretty far out there theory that I have been thinking about. I went online to see if I could find anything, but wasn't able to find anything like my theory so here it goes. My theory is that investiture is evil. I got thinking about this when we see Vivenna in Oathbringer. Now we don't know this for certain so I could be way off, but it seems that Vivenna's sword does not have the same effect on her, other beings, or investiture that Nightblood does. This got me thinking as to why. It seems clear to me that it has to do with the command of "Destroy Evil". In Warbreaker we see a problem with this command because Nightblood is not aware of what evil is. He is able to kill people based off of how they want him. This seems to be one way in which his command is fulfilled. Yet, there has to be more because Nightblood does so much more than just kill bad guys, or have bad guys kill themselves. With him, the effect of investiture is intriguing. In the two instance we see of him, he destroys investiture. He doesn't change it. In Warbreaker, color is used to access their breaths and commands. He destroys color. It does not return, and clearly the breaths do not either. In SA, he absorbs the stormlight whereas every single instance of stormlight use we see it become released back to the world to be recycled. It seems to me (I could be very wrong) that he is destroying investiture. This plus the fact that Surgebinding destroyed the world of the humans makes me think that their is something going on with investiture. Now I know that investiture is everything, so I doubt it's purely evil but there is something about it that causes Nightblood to destroy it the way he does. Anyway, there you go. I could be way off I know this was just something I wanted other thoughts on.