Earlier quoted context omitted.
I guess I disagree that uploading minds is more feasible. One is more of an engineering/physics challenge, and uploading minds is dependent upon a vast set of unknown unknowns. We aren't even out of the door on the idea of biological computing let alone at the mailbox.
One key difference is that we know brains can exist. We might not know the entirety of how they work, but the important thing is we already know they can be reproduced in some fashion. Hyperdrive or any other form of FTL travel is purely in our thoughts. Nothing currently exists that even proves it is possible in our current reality. For all we know we could spend an infinite time attempting it and never achieve it.
I'd rephrase the "nothing currently exists that even proves it is possible" to, nothing has been observed to demonstrate its possibility.
That and things like warping space could throw a wrench into the "we can't travel faster than light". But maybe we can end run around it. Though the same can be said of the brain, we really know we don't know a lot more than what we don't know about physics.