Just about all human effort is directed towards things which aren't curing disease and downloading our brains to a computer. So it's not SpaceX to complain abou

Just about all human effort is directed towards things which aren't curing disease and downloading our brains to a computer. So it's not SpaceX to complain about. It's the corner store and the hairdresser down the road. Collectively they're all wasting far more effort on far more useless activities than SpaceX ever will. More directly to your point - Mars solves the risk to our species of a comet strike. Musk mentioned extinction events in the video. They've happened before and will happen again. All the health and cognitive improvement in the world won't save us from that.