On both of those places you have to deal with the Russian and Australian Governments who will take a significant % of the value you create. You also have a dee

On both of those places you have to deal with the Russian and Australian Governments who will take a significant % of the value you create. You also have a deep gravity well. Land on Mars is free, there are zero taxes, no political system or unwanted populations. There is no waiting for regulatory approval on a new building, no requirements to hire x % of your workforce as y demographic subset of the population. There is no national Government to negotiate with. Your population is completely comprised of high-IQ, motivated and skilled people, making for the best human gene pool of any place in the galaxy. When SpaceX gets to Mars, it can simply... build, without limits. This is something not seen on Earth since the colonisation of the new world (which even then had native populations to contend with).