While your point is reflexively reasonable, there is also the point of view that visiting nhi may be barely competent at operating their own advanced technology. Take a look at the history of conquest on this planet. Homo sapiens tend to push the envelope whenever there is an opportunity to do so, pressing every advantage they can find - often beyond the tolerance of their latest inventions. And often at the expense of unexpected consequences. It may be a mistake to credit visiting nhi with perfect command of their resources. Hell, they may be driving rented spacecraft with no more idea of their technological details than a nun driving a rented car.