If one knows some physics of the Mars, one should know that if large scale migration of humans to Mars is made practical, with the same amount of work, one can reverse the damages on planet earth ten times (and which is desperately needed). And if one knows some physics of the Sun, one should know human evolution itself posts way more challenges long before the burning out of the sun.
If a ten yeatr old child is ill of cancer, one should put the effort in healing him, not in "visionary" works in what kind of senior housing should be better for him some 60 years later.
Musk is like Trump, his Mars conolization plan is like Trump's MAGA. They are both gifted people, but thier giftedness is more in promoting themselves.
True contribution to mankind is to help to clearify true vision into the true future, not to confuse it by creating hypes.