Things exist in context. What's good for an introduction to a book I've already bought is not necessarily good for a stand-alone article for a website. Although I would argue that even the former should have some mention of the obvious starting points and objections. If I read this introduction in a book store or library I'd be putting it back on the shelf.
No, I haven't read the book and I shan't for this passage gives me little confidence that the book would do them justice.