The American Way of Electronic Signatures

An electronic signature is not what security nerds think it is, or think it should be. This is a valid implementation of electronic signatures:

»Instead, you sign a piece of paper and hold it up to your iSight/Facetime camera while Preview snaps a photo. It’ll then detect the signature and allow you to add it to your document. To do this, just open the PDF document you want to sign, click “Annotate” in the toolbar if the annotations bar isn’t already showing, and then click the Signature drop-down menu.«

(Lifehacker via Timyeo’s Blog)

If people are happy with it, as they surely will as Apple made it, what exactly are the problems that we are trying to solve with all our cryptography?