Because is a new way of publishing. It involves multiple short "ideas", each one answering a question that another idea raises. This shows how the ideas behind an investigation relate to each other, so that a complicated subject can be developed a piece at a time and a reader can see how the author reached their conclusion.
Because is not an argument against articles. It is an alternative way to develop and publish the thinking that articles come from. This post explains why it exists, using the format that it describes.