6.0 Story Speculations

[Yuella]

I would say that causing billions of deaths and both mentally and physically crippling every living thing in existence counts as doing harm.
And if I'm reading that Q&A correctly they've just said outright that it rendered the star unstable. We may not know the specifics, but apparently that is the case.

Regardless, the lives on the stars have a say on whether they want to be sacrificed or not