Articles like this will perpetuate that belief. Bad soft skills? Lack of a structured lifestyle? Cannot focus? Many people will relate to these because they take effort to build.
Though Wilson touches a good point. Medium levels of intelligence is require for most jobs, even in Investing you do not need to be that bright to be "the best" in the field. Additionally, we know now that novel ideas comes from a background process in your brain that takes a lot of time and domain knowledge to develop.