Scale of operations matter.

Quite the opposite. Humans get up to barbaric, heinous shit whenever they have new layers of indirection and force multipliers at their disposal.

If you then add randomness as an essential premise, you get The Dice Man

If you connect the spicy automcomplete to the "Doing Things" button then you are responsible for the ethical questions when it presses the button.

If I wire my autocomplete to launch nukes, there are definitely reasons to worry.

It's not just an ethical problem.

If the Orphan Crushing Machine is just a machine you don’t need to worry about it being put on wheels.

I think you agree with the OP. In this way, the tool has no ethical problem (there are plenty around how they were trained and such, but that's besides the point), the problems are with how it's used. The ethical problem is how people are behaving and how they are abusing each other, not the tool they are using to exert that abuse.

I suppose it's a little bit of a "guns don't kill people" argument.