I still don't understand how anyone can seriously claim that they could keep the AI in the box. Either your AI has no influence on the outside world (in which case why bother building one since it can't help you from inside the box), or it is able the affect the outside world, in which case it can do what it wants, because it's smarter than you. You can 'always say no', sure, but that comes under completely ignoring…
You are overstating the case here. Super intelligence is superior to human intelligence, but it isn't magic. There are situations where an advantaged human will beat a disadvantaged super intelligence.