At present, we are transforming Earth to our short term needs, but against our long term needs. The timescales don't match, because expanding to space should take several centuries, but we are risking wrecking the planet after only two centuries of industrial civilization, roughly. So it's wise to be afraid of extinction.
Reverting to low-tech after civilizational collapse... that one seems far too plausible to me.
And we've used up loads of the easily-accessed coal and oil. industrial revolution 2.0 may not actually be feasible.
https://en.m.wikipedia.org/wiki/Archean
https://en.m.wikipedia.org/wiki/Permian–Triassic_extinction_...
While what is happenings is extremely bad for our perception of what life is like, life itself has been through much worse.
I’m not particularly eager to see humanity extinguished or the world reset into another age. But if it happens, life won’t be gone from the universe even if there’s only life here on earth.
Nature might, who knows? And maybe we are just “programmed” to feel our own importance, and thats perhaps necessary but not sufficient to save us.