True, in a way. Without solving said mystery (of how an animal brain produces not only calculations but also experiences) you could theoretically create philosophical zombie uploads. But in this post what is really desired is to save all conscious beings from death and disease by uploading them, so to that effect (the most important one) it still looks impossible.
(I deleted my post because on hindsight it sounded a bit off topic.)
I don’t buy that even Buddha himself could avoid the suffering from the most severe forms of pain, which are also the ones that matter most—which makes it pretty arrogant to claim that suffering is optional imo.