I don't think the signature is meant to verify that you are you.. Just like locks are not really to keep out thieves. Signatures and locks are thresholds.. Yo

I don't think the signature is meant to verify that you are you.. Just like locks are not really to keep out thieves. Signatures and locks are thresholds.. You knowingly, intently, explicitly and provable overstepping that threshold when you fake a signature or break circumvent a lock. That's the real value they provide. The threshold raises the bar a little bit, it makes it require a bit more determination and activation energy, so it reduces the pool of potential criminals.