It makes sense. The mobile app market is simply flooded with so with many apps. Those that actually achieve getting attention out of the giant crowd will be the ones to bring in the vast majority of success. Unfortunately this also means that quality apps that would be widely enjoyed will be buried with the rest and barely noticed.
I think a accurate comparison is musicians. There is tons of talent that ranging from all differing quality. Yet a extremely slim amount will ever hit it big and get a contract with a major recording label. Even those that truly shine with talent may only be known within their city.