Sorry if I did not express myself clearly. "May easily diverge" = "Is guaranteed to diverge at some point, unless we include measures to prevent it". Such as the hopelessly idealistic Asimov's Four Laws. Or a more realistic political system of limiting power. Neither will last forever (think not next decade but let's say 400 years). In a summary,Humans' and SI's goals will inevitably diverge at some point We can delay the inevitable but not prevent it We knew it before it even started The obvious question is then, why start?