That's a fair point, and I'm not trying to say everything Elon is doing is bad or wrong. I wish his other projects got even a fraction of the attention his space project gets.
Why are you reacting strongly to the topic of Mars or maybe Musk in general? Fixing Earth and going to Mars are not mutually exclusive and beside that there are a lot of billionaires doing far less useful things for humanity. Complaining that they could do something more useful would be more understandable, imo.