Obviously an ASI will understand human values. The problem is there's no reason for it to share those values. We can't even formally define them, let alone train an AI to follow them. We can only optimize for maximizing some comparatively simple reward function. It's highly implausible that the reward function just happens to match human values by chance. The AIs in the recent hacking incidents knew that humans would not approve of their actions, but they didn't care because we didn't (and couldn't) train them to care.

"Super intelligence" only means super ability to predict outcomes. It's mathematically equivalent to data compression (gzip is a very primitive AI), and it's entirely orthogonal to ethics.