Oh cool, I have friends in cognitive science saying the opposite. What gives? Maybe it's because the argument doesn't fucking hold up without sources?
You also seem to have tunnel vision in that you only see one solution to this, rather than seeing that science is convergent, and that most solutions can be reached in different ways. Nowhere did I say or even hint at that a mind equals a complex modern computer with AI, I don't know how you come up with this. Scanning and recreating a brain by "copying" elements of an already existing brain does not even necessitate a computer more complex than being able to visualize and print its molecular structures.
PS: My argument didn't change the slightest. It is still within 50 years we get enough longevity to see eternal life. Your arguments on the other hand, consist of strawmen and ad hominem. If trolling, then consider me rused.