That's an enormous impact even if all you did with the laptop immediately after purchasing it was throw it in a volcano. It's not wrong to realize that money is subject to diminishing returns like everything else, but it misses the most important thing about it, and that exists outside of you.
So the impact that the adoption of fungible value by human society. As you alluded to: unspeakably big and arguably good overall (lets see the next 200 years before we judge but lets say massively positive. We got vaccines and space travel.)
Obviously it is not all attributable to money. It is the inventions from the wheel to the sexstant, the schools, socialism, capitalism, invention of writing, religion, even war etc. etc.
On the other hand, "Impact is money and money is Impact". is not true.
A teacher gets a fixed wage. They can be a great teacher and inspire the kids to do great things, or they could make the kids feel insecure for life. Same dollar wage both ways.
It's a "tool", currency for exchange, but also a store of value, a unit of accounting, etc. etc.
A few hundred dollar notes in your wallet is a tool you can use to buy food and pay rent for a while. A company worth a few million is a measure of the impact, value to customers, net present value of future income/cashflows, etc.