The website is called React for Beginners, not React for Experienced Javascript programmers.
And aside from that, react is very different from what a lot of experienced javascript developers may have worked with. My team works with CanJs, it would be a big leap to go from that to React, experience be damned.
Re:Show HN: React for Beginners
by sergiotapia on Tuesday November 03, 2015 @03:11PM
(#10502222)
You learn the basics, you don't learn how to structure your files, best practices in React and such. That's why I, an experienced javascript developer, bought this course. I intend to use React in a Meteor app.
Also I don't think a begginer course will make everybody a master on the topic.