Yeah, but then responsibility for the consequences of action of the system falls onto person pressing the button. I hope that no one would be willing to take such responsibility without second thought.
What part of placing a human in the loop requires telling that human what they’re approving, or even that they are approving something? Pressing a button could be as simple as following orders—or giving orders.
Interestingly enough, this and many other related ethical conundrum were covered in the Nuremberg Charter from 1945.
That is the same thing, you just added designated sacrifice person into the loop.