You don't drive economic growth by rebuilding infrastructure that already existed, but now in the wrong place.

You might "create jobs" that way in the general sense of stimulating an economy by borrowing against future monies, and that may be helpful in smoothing out a business cycle or avoiding a negative feedback loop, but "creating jobs" is only useful when the economy is understimulated (which it isn't at this particular moment, though I'm sure it will be again at various times between now and say 2100).

You increase the size of the economy, rather than just smooth out the business cycle, by increasing the net productivity of the population.

But that requires energy and materials which, if not managed properly, will make the problem even worse. Politically speaking, the biggest challenge to us is mass migrations may be required in order to adapt to the changing climate. Such migrations are rarely peaceful.

But then you inconvenience incumbents who expect to be able to retire to Florida on the value generated by capital that was allocated without regard to the impact that humans have on the planet's climate.

I cannot tell if that is a joke or not. I could see it both being said sincerely and sarcastically.

Broken civilization theory > broken windows theory.