Back in my days of being trad published (mid-list obscurity) I spoke at several writers festivals, just in general talking rubbish and anecdotal tales about my favourite subject (me), and I quickly realised that most people in the audience wanted nothing else except for me to reveal THE SECRET.
THE SECRET to getting published, to getting an agent, to writing an entire book. My achievements had nothing to do with long hours, effort, and plenty of failures. I simply knew THE SECRET and I just might tell them.
I think these many, many courses present to a lot of people as a shortcut to avoiding the hard yards. A simple formula, or a template, that takes out any need for creativity, effort or talent.