> Costs lowered a lot or the benefits outweighed all associated costs.

How is this even quantifiable?

How about this. Before using AI to make fake images and help kids cheat on their homework, we take it offline and use it to solve it's own problem of energy use.

You know what this does not happen? Because the goal is profit and the profit comes not from solving real important problem, but by making people think it is helping them solve made up problems.