But even then a strong case can be made that without those companies people would still satisfy the demand via black market causing same harm bit without money benefits to society.
So still it is better with companies than without.
I thought we were discussing total wealth and not wealth for some portion of the population, at the cost of somebody else's wealth (computed holistically, not just money but also health and overall wellbeing). By this logic, stealing increases wealth of the thief.
Another one is weapons selling companies.
But even then a strong case can be made that without those companies people would still satisfy the demand via black market causing same harm bit without money benefits to society.
So still it is better with companies than without.