Commerce is the cornerstone of civilization and everything good we experience today is a direct result of it.
Here is life before commerce.
Jeff makes shoes but has no food and is hungry
Brida has food but no house
Sam has a house but no shoes and food etc
Multiple this 100x in complexity and welcome to "bartering"
Capitalism and commerce allows these people to trade the value of their labor so that they can buy the value of someone else's labor.
There is literally nothing more pure than free trade. To make money, you need to provide a good or service that others consider valuable enough to trade their labor for. You then buy other goods and services that you deem valuable.
It's everything else that gets in the way of free trade that is the problem (taxes, regulations etc)
I didn't get rich scamming anyone. I provided immense value to possibly thousands of potentially millions of people.