SpaceX isn't opening space to everyone. They're are preparing for the select few to be able to escape once the earth is no longer sustainable due to their own efforts.
Actually given that the first colonists on Mars will live pretty miserable lives before dying early of radiation poisoning Musk and Co are trying to recruit other people to move there.
Musk, Thiel, Bezos etc. none of these guys have ever said they want to move there.
No they aren't. They're trying to design robots that can build the habit for them before they arrive and pamper them once they are there. Maybe they'll send a few human guinea pigs first to work out the kinks, but they ain't trying to go to Mars, or anywhere, for the good of the human race as a whole.
Musk has repeatedly talked about how he wants to go to Mars.
Musk, Thiel, Bezos etc. none of these guys have ever said they want to move there.