And also "if there isn´t life..." as in:
If there isn't life elsewhere, why not and what is missing elsewhere that was present on the Earth when life emerged?
To me it seems like a if there isn't life then why not?
...and if there isn’t life on these planets already, we now have the opportunity to possibly see extraterrestrial life grow. Even if there isn’t life on these new planets, it’s hard to argue that Earth is the only planet inhabiting intelligent life.