I completely agree. A few months ago, I switched from being ultra busy on my company to taking some time to do what I really enjoy. As a result, I actually get more done now than before.
The article is well written, you should read it. Here is a tldr if you don't have the time though: http://tldr.io/tldrs/51680e1bc2bdcc645c000169/busyness-is-no...