Many people have built products used by far more people, that have generated far more utility, and accumulated far less personal wealth. These things aren't connected.
It's possible that the first sentence is true. Open source software comes to mind. However, that doesn't undermine the point that the reason he has money is because he built things other people wanted to buy. The fact that other people chose to forgo monetary rewards for their creations, or gave away their money, is not relevant to the question of whether he provided value to others.