Like a burned out brick building, a burned down planet is still there, but still also burned down. Of course it doesn't 'disappear'
Earth has been a rich, life sustaining planet in far hotter conditions then anything we are projected to take it to.
We can kill billions of ourselves, but short of ww3 earth will crack on just fine.
Social media emotional hot-takes dont match the numbers.
We are still screwed though.