I wouldn't be sure about that. How prokaryotic cells evolved into eukaryotic cell is not well understood, and is thought to be an highly unlikely, chance event. Conditions under which that is possible is also not clearly understood. Complex life requires eukaryotic cells.
So by no means is it clear simple life anywhere has high probability of evolving into complex life.
So by no means is it clear simple life anywhere has high probability of evolving into complex life.