Most often the vague business advice shared is purposefully vague and is used as a marketing hook by the people giving it out to land on lucrative contracts/con

Most often the vague business advice shared is purposefully vague and is used as a marketing hook by the people giving it out to land on lucrative contracts/consultancy deals. For instance even for the books you recommended the reviews could go like this: - "Some useful information, but mostly common sense and nothing that isn't available elsewhere. I think the author struggled to make this into a book, as the subject could have been covered in far fewer pages and for a lot less money. I bought a few books on this day, this is by far my least favourite."