Don't think of it as a copy but a continuation of you. And why do you think I can't continue to live in a new body, brain included, cloned from my proprietary genome, with a digitally transmitted cache of my proprietary self which is electromechanically diagrammed from how my self has extended into my personal body over time?

And by the way, your judgment of permanent death is ignorant of the ancient Hellenic state of mind which actually germinated the European Scientific Revolution which your scientific thoughts are predicated upon. They didn't believe in death; indeed the Christian religious concept of the resurrection is paragonal to enlightenment scientific pursuits; in that the titans of Europe believed Heaven is justified. The "random-walk" experience of human cellular life which you are inferring is actually a century's old aberration in this great ascension of man towards everlasting life.