I remember listing to another bbc doc with Brian Cox and the interesting takeaway for me was; life has been found everywhere on earth, even in places never touched by sunlight. As such life seems to be as inevitable as nuclear fusion given the right ingredients , sufficient warmth and time.
Whether a moon can tick these three boxes is anyone’s guess, time being the most questionable topic.
i also firmly believe we will never find anything of consequence relying on rovers. A human on Mars could’ve done all the work of all the rover’s (20 years now?) within a long weekend. Never mind what could simply be found plunging a spade into the Martian surface.
So for me, rovers are Penny rich but pound poor. now is the time for astronauts!