It's true that the preponderance of participants in businesses that are attractive to "main chancers" are losers. I also believe that the speculative buying and selling of domain names is a negative sum game over all. However, since 1998, I've registered a myriad of generic names and I sell them over time. The number of domains that I've purposely let drop, because my experience tells me that they are not worth holding, is extremely small. For me, it's both a vocation and an avocation.
Different people bring different talents and interests to this market. Mine are based in language - the English language. That means that I'm likely to "miss out" on early technological registrations, but likely to guess right about the popular adoption of linguistic conventions. Others like to code or build websites and use domains as a vehicle for those skills - which may be substantial. They, and others with design skills, may make a living and think that they're great domainers, when really the main source of their success lies elsewhere. Business skills, of course, lie behind the greatest financial successes. But great financial success isn't the only objective for most people. Those market participants, while not making lots of money, may also be winners for many other reasons that define them as human.