Some things are in fact worth dying for.
This isn't to say that measures to reduce carbon emissions can't or shouldn't be taken, they can and they should, but with a mind towards exactly what you deride, preventing as many people as possible from falling into draconian economic and social misery. That at least is something we concretely know to be possible if governments adopt the wrong control measures in a heavy handed way. The pandemic showed it clearly and concretely in many forms.
We're not talking here about the impending, concrete impact of a large asteroid, or a super volcano eruption that's definitely imminent, where mass economic sacrifice for the sake of saving humanity would be understandable. Climate change is, despite all the political fanfare, something that has too many variables to clearly define as a cataclysm.
Given that, there is nothing selfish about wanting to avoid misery and "dying" for yourself and your children in the face of ambiguous predictions about future events. If you're so convinced that "some things are worth dying for", what stops you from applying your own advice instead of preaching sanctimoniously to others?
We won't ever understand the problem space of the entire ecosystem well enough to make a complete solution. But there are easy things that can be done if we actually cared to, and we certainly don't need to keep piling on more things that almost certainly make things worse.
Sure, like stopping subsidies to fossil fuel industry but I don't think cutting CO2 emissions is easy as you paint. How would we do that in a short notice? Through government? I'm extremely pessimistic towards "solutions" that require bigger government or new taxes as politicians almost always follow perverse incentives and don't care about long term consequences. My government subsidizes the coal industry using taxpayer money while making it hard for citizens to generate their own clean energy through laws and taxes. Government isn't the savior.
> We won't ever understand the problem space of the entire ecosystem well enough to make a complete solution.
More data and better models does nothing to prevent the planet from warming but help us plan mitigation strategies ahead and give us more confidence towards the efficacy/consequences of interventions. Right now we clearly understand that the planet is warming and that we are somewhat close to a cascading failure but what else? I don't like the prospects of downing living standards to the stone age so we may delay global warming. This isn't a solution and is a big sacrifice.
I could very well be wrong, and if core systems don't break then I do understand the goal of just being less miserable today.
I'll keep voting against anything that makes me poorer and more miserable.