On a long enough timeline I agree with your point, but your argument is one of the many many common examples we see now of people simply not understanding the timeline. 2050 is 29 years away. Kids born in the next few years will barely be out of school by the time we have to have this mostly solved.
True, but odds are by 2050 we will not have this mostly solved and we will still be arguing with each other about what's important when it comes to preserving the current climate vs adapting to a changing climate. I think that on the short timeline it definitely makes sense to use progeny as a means to effect change according to ones own ideals.
