Great, he has a rocket. But he doesn't say anything about what'll be in that rocket. He talks as if he can just buy an Interplanetary Civilization Starter Kit from the NASA shop, ship it and bang, multi planetary species. Reliably growing enough food in a closed loop system isn't a solved problem and is still being worked on. Not to mention habitats, industrial activities as such as mining, refining, fabrication, ...
He doesn't give a 💩 about this planet. He/we will fuck it up and then (in his unstable mind) we leave, with planet fucked up beyond belief for any other animals.