Earlier quoted context omitted.
This kind of zero-sum thinking - then notion that accumulation of wealth necessarily means it must have been taken from others - is extremely detrimental to society.
If "wealth" is the value of labour, then there is a limit to the value you yourself can generate with your own. After that, to become more wealthy you must work out a way of taking that value from other people, and making it your own. There is no other way capitalism can work.
The author writing the story didn't take millions of dollars from the persons manning the presses, without the author the work done by the presses wouldn't be as valuable and those millions of dollars of value wouldn't have materialized.
The same goes for most of the people who got rich on their own, they realized a way to create more value using the same number of workers, so they get rich and it didn't involve taking from anyone, just giving more value to customers.