Article fails to define "worthwhile", thus rendering its many value judgments moot. Article refutes "existential risk to human life" with "billions of years of

Article fails to define "worthwhile", thus rendering its many value judgments moot. Article refutes "existential risk to human life" with "billions of years of supporting life", which is a non-sequitur. "Thousands of years of supporting human life" isn't quite so convincing...