No, it is not fair argument. New alloy doesn’t change how knife operate and isn’t going to increase number of knife attacks by an order of several magnitudes.
This will. Because good photoshop work was skill that took time to master, while now it can be done by any random moron.
Your other argument is dumb as well. People have a right to not having their face photoshopped onto random naked body. Whether it is really your body or not is not necessary to make you uncomfortable.