Way ahead of you; I already stopped pretending we'll have a habitable planet by century's end.
Collapse is the default fate of any civilization where not actively prevented. Show how it is being actively prevented, not accelerated.
"The [doomsday clock]'s original setting in 1947 was seven minutes to midnight. It has since been set backward eight times and forward 16 times for a total of 24, the farthest from midnight being 17 minutes in 1991, and the nearest being 100 seconds, from 2020 to the present."
[doomsday clock]: https://en.wikipedia.org/wiki/Doomsday_Clock
Regarding the Cuban Missile Crisis in particular, the Wikipedia page says:
> The closest nuclear war threat, the Cuban Missile Crisis in 1962, reached crisis, climax, and resolution before the Clock could be set to reflect that possible doomsday.[citation needed]
If someone could add a citation, please do.
But it's a falsehood, and it becomes a lie when you share it, so maybe keep your delusions to yourself next time.
We have to consider every scenario, if not we are the one deluding ourselves.
I certainly expect things to get worse before they get better, but “by century’s end” is too far away for even better/worse to be predictable to high certainty: there are 78 years from now to 2100, and it was only about 73 years between the president of the Royal Society, Lord Kelvin, saying “I have not the smallest molecule of faith in aerial navigation other than ballooning or of expectation of good results from any of the trials we hear of”[0] and Apollo 11 landing on the moon. What’s going to happen between now and then? A crop of GM phytoplankton with super-photosynthesis that stabilises atmospheric CO2 at 200 ppm? Von Neumann machines disassembling the moon and turning it into a ten billion O’Neill cylinders? A bioweapon that turns all humans stupid? Plain old global thermonuclear war? All of the above? No way to tell.
If you think there's a 0% chance of humans going extinct perhaps you are the delusional one.