Well than and there just isn't a whole lot of training data to play with. It's doubtful that a simulator could ever model actual landing situations well enough

Well than and there just isn't a whole lot of training data to play with. It's doubtful that a simulator could ever model actual landing situations well enough that the whole thing will a) work on Mars and b) not overfit weird behaviour in the simulator. Faulty ground sensing has resulted in the loss of more than one mission, and deep learning isn't going to fix any of that. Oh, and s/wastely/vastly/ ;)