Mad Max is a fictional movie and has nothing to do with reality.
The greatest risk from climate change is not from natural disasters directly like in Pakistan, but the downstream effects of frequent severe weather events and warming of local climates. The loss of life and levels of migration will be much greater when critical infrastructure such as energy production, food production, and clean water supply, are impacted.
Either way, humans going extinct or being reduced by several orders of magnitude is a dire outcome, and we should be doing all we can to prevent it.
There's an enormous difference between total extinction, and civilization being wiped out; that's my whole point. You're trying to conflate the two, and they simply are not the same. For most of human history, there has been zero civilization, and certainly no "critical infrastructure". Humans can go back to that. It won't be pretty, but it is possible, and it's not like extinction.
A temperature increase exists where earth will become uninhabitable by humans. One study mentioned above estimates that temperature increase is 12C. It could be higher or lower, but we don't really know without further studies on the topic.
Before reaching that temperature, life on earth will become a lot harsher for all due to the effects of climate change, and we should be doing all we can to avoid those harsher conditions, regardless of what we think the upper bound temperature for humanity to continue existing is.
The greatest risk from climate change is not from natural disasters directly like in Pakistan, but the downstream effects of frequent severe weather events and warming of local climates. The loss of life and levels of migration will be much greater when critical infrastructure such as energy production, food production, and clean water supply, are impacted.
Either way, humans going extinct or being reduced by several orders of magnitude is a dire outcome, and we should be doing all we can to prevent it.