There's a whole class of people who joined the tech industry not to use the internet to change the world for the better but because they would have gone into finance in a previous life.

The optimizers, the people who ask themselves, "how can I extract as much value as I can" and don't think through the implications of their actions.

Not thinking about the implications of their actions means ignoring externalities.

It's important to think about the end you're trying to achieve, not just focusing on the means.

Technology is a means to a larger end for improving society.