Even finance isn’t zero sum. The money supply is literally something that is managed. When you take a loan, the bank has created money, since the deposits are still on the books. When you buy insurance, you are getting security, insurance company is getting a premium, and you are both happy.
When you take a loan and start a business, the bank makes money on the interest, and you (hopefully) make money because your business is providing more value than it was. You bought a new machine and make widgets 10x faster, etc.
Also, people confuse money and wealth. One is bandwidth, the other is data. You use bandwidth to transfer data, which is what you care about, and its possibility for creation is basically limitless.