Those people generally aren't the ones trying to shame people into making mostly useless actions that don't move the needle. They know full well that the solution involves change at the highest levels. Individual action isn't solving this. Even a general shift in consumer-led actions isn't solving this. The only thing solving this at this point is coordinated, international action, changing how we produce, which is the only thing that will change how we consume at a level sufficient enough to be meaningful.

Think about the difference between how we individually spend time and effort to sort our recyclables, and how meaningless (and even harmful) that turned out to be, when the real problem was that governments weren't cracking down the unnecessary production of plastics.

"We probably need to do something about our CO2 scrubbers on this space ship we're all traveling on. They don't seem to be working very well."

"OH COME ON, if you were serious you'd have spaced yourself by now so you stop generating CO2. Just shut up already."

[EDIT] OK so that's hyperbole but I do think it's absurd to disregard someone's opinion on climate change because they haven't voluntarily and unilaterally upended their own life in order to delay warming by, maybe, a few seconds.