I think he'll accomplish everything he described Friday and fail to colonize Mars anyway. It really doesn't matter how brilliant he is or how successful he is

I think he'll accomplish everything he described Friday and fail to colonize Mars anyway. It really doesn't matter how brilliant he is or how successful he is with SpaceX's plans. No amount of human brilliance can circumvent the fact that mars has 38% of Earth's gravity. I fear that this will prove an insurmountable barrier. If living in that environment renders you unable to survive in Earth gravity due to the strain on your heart, and it will take hundreds of years to make Mars be like Earth, who is going to want to live in that land of barren nothing for centuries, unable to visit the lush homeworld?