I hard disagree on this, and after watching a lot of his content I kind of got the feeling that this was his position. The united states is fucking HUGE. I agree we will not fixed the US within our lifetimes, but there are a lot of major cities that have a good launching point. Mostly in the northeast.
We also have to think about the major CA HSR project that will be finished in our lifetimes, and if that project is a success it could have serious implications for transit across the whole country.
This attitude gets us nowhere. No serious amount of people are going to move out of North America, especially not the United States given how fucking huge and diverse it is. Comments like this actively hurt our cause.