Re: Martian rovers:
It's a tradeoff. I believe a human geologist, once gotten to Mars, could accomplish more, and more quickly, than could the robot rovers. Said geologist would also be better able to respond to unexpected circumstances than could the rover, which relies on preprogramming and a light-speed-delayed communications loop.
However, the equipment required to keep said geologist alive and functional on Mars, as well as out and (maybe) back, adds tons more mass that must be boosted and braked.
QCverse could send AI-equipped rovers, sure ... but QCverse AIs seem to have a predilection for "Fuck this, I'm on my own here."
Re: Marten and his rover:
Well, tradeoffs are involved there, too.