Unless you live in a self-sufficient homestead in the middle of a forest, there's no such thing as a "self-made man". Take Amazon for instance: they benefit from roads and infrastructure. But they also benefit from things like police and courts to protect their private property, just like they rely on a workforce capable of meeting their demands. Ultimately, they also benefit from a stable society and mostly wealthy enough population to afford their products! And finally, one can say that they benefit from the work of the people who invented the Internet, who invented computers, who made the American Revolution, the ancient Greek philosophers and the medieval mathematicians and Copernicus and Galileo and Newton, in short: directly or indirectly from the combined work of every single human being which lived and has ever lived. That's what's hidden behind the simple word "society". And that's why no person is "self-made".
For this, Amazon reaps enormous profit. They need to pay what's due: they owe a debt to society, for it was society that enabled their profit.
In a more practical sense, individualism is often found in practice to be pulled as a justification for privatising our economic output in the hands of a lucky few, and for ever-greater concentrations of wealth and an unjust distribution of duties and rewards. I'm suspicious of it on that count as well.