Very true, all in all “not a solved problem” is factually incorrect and, like many safety concerns, based on problems of reactors from decades in the past. Meanwhile global warming and pollution are very much present day concerns and we need to do something on a shorter timescale than wind and solar alone will allow.

I only would be careful assuming all the problems are on reactors from decades past - reactors currently in operation use decades old designs and are more often than not, decades old.

But yes, I'd take a dozen Chernobyls over a runaway greenhouse effect.