Very true. I knew a C++ developer who knew the language inside and out, incredible skill, 100% on a written test where most people get hired with a score of 60%

Very true. I knew a C++ developer who knew the language inside and out, incredible skill, 100% on a written test where most people get hired with a score of 60%+. He offered very little to the company other than optimising the build to run faster. He just wasn't motivated to solve the problems the company needed solving or engage in the product. Unsurprisingly he wanted to play with C++ all day long. I also knew a developer who came from a coding bootcamp, adequate CS fundamentals and basic knowledge of JavaScript and Java. He was the most productive developer I've ever worked with. Laser like focus and great social skills. He occasionally needed guidance from more technical developers but he knew when to ask for help and he got the job done.