>Why don't climate dooms-dayers not see that their very tactics of spreading irrational fear (instead of rational solutions) is antithetical to their desired outcomes?
It's not irrational fear.
Why do cynical eye-rollers like you always try and crab bucket people's attempts at changing things for the better?
It's an interesting and valid point, I think. Fear may motivate some to start changing and looking for solutions, but it has the opposite effect on many: denial is one of the most pervasive defense mechanisms in psychology. And climate denialism has got to be the most astounding example of it.
From the other perspective, it's yours that is cynical (saying that we're all going to die in a few years), and its yours that is crab-bucketing us into the past (stop eating meat, stop flying airplanes, stop driving cars, stop taking holidays, even stop watching YouTube[0]).
How far back down the technology tree are we supposed to go?
It's not irrational fear.
Why do cynical eye-rollers like you always try and crab bucket people's attempts at changing things for the better?