It is untrue though, for the reason pwn states.
There's one real concern here, human directed malicious actions with a model. But even that's limited to state or near state actors. The hardware necessary to run even a non frontier model capable of this stuff is in the 10's-100's of millions of dollars.
The model deciding to copy itself so that it's beyond the ability of the developer to flip a switch and shut it off is pure sci fi.
Oh, the earth will be fine.
It will be uninhabitable for long enough to cause human extinction, but the planet will be fine.