Amen. Mankind is not going to Mars as an escape route. Elon uses this as a way of generating a vision/dream.

When mankind makes serious progress to any of a) living at the poles in scale b) living underwater at scale c) living subterranean (underground) at scale, get back to me and we can talk about offworld habitation (Mars, Venus, or Luna). All of these are hard enough, and provide mitigation against various disasters, at some level. They're hard enough problems to solve as it is.