According to this website, Mang0 has earned about
160,000 dollars from his entire career as a top Melee player. I'm going to be very,
very generous and say that he's only been earning money since 2008 in this example and compare him to a person working a minimum wage job for a decade. By these calculations alone, a person working minimum wage would make about $150,000 dollars for is most likely unskilled labor (running a cashier, flipping burgers, washing dishes, and so on). But unlike playing a competitive video game for an income, a person working minimum wage has a steady income which doesn't fluctuate on their ability to perform compared to their peers. So you're correct, competitive gaming is absolutely
not a lucrative career choice. You can see this in the lifestyle of most players, however, who live in cheap little apartments or with their parents.
This makes the indignation of Melee players all the more confusing. Mang0 has made Melee literally his life, tatooing his primary characters onto his body and outright insulting Sakurai, the creator of the Smash Brothers series, at the promotional event for Smash Ultimate. And that's
just Mang0, I guarantee you that there are even more annoying, self-absorbed, obsessive Melee players out there.