Elon repeatedly said he's fine with sacrifices made for the sake of progress. It's just that he thinks others should be doing sacrifices and he should be the guy doing progress. Very convenient for a narcissistic manbaby.
The death toll of other people isn't relevant to them. What's important to Elon is that if Elon wanted he could go to either city and have a wonderful time, and therefore no harm, no foul. All that matters to Elon is what Elon thinks and feels, there is no larger world beyond what he directly interacts with.