I really appreciate you’re enthusiasm and intake on this topic, but you also need to be realistic on the place you express your opinions. Medium is not only to read about topics from skilled people but also to read about new ideas.

Nobody said that they’ll make a lot of money easily, in the text is stated how Amazon is actually helping you start your business and avoid all the hassle of finding someone to publish your books since you can do it easily on their KDP site with practically minimal effort.

As every other business this one as well can skyrocket if you combine other skills as well such as copywriting, SEO, social media marketing, PR relations etc. Since these skills take time to master it’s good to have an idea to start and learn these along the way.