Every line is not a paragraph.
In Word, every press of the Enter key creates a Word paragraph.


I suspect that every user, from time to time, uses the Enter key for spacing; I know that I do, in documents.
No well-formed template should.

Again, empty paragraphs add disproportionately to the size and complexity of documents. A large number of the problems reported on forums like this are the result of empty paragraphs that carry formatting. If text is directly formatted, each paragraph mark will carry up to fifty different formatting commands that Word has to interpret on the fly as it renders the document on the screen or print.

Any Word training should include use of styles and inter-paragraph spacing. This is not vba or expert-level material. When I hire staff to do word processing I do test and train. Word is not a typewriter, it is a complex program when used to produce complex documents. Basic Concepts of Microsoft Word - from Shauna Kelly

For simple documents, it is simple to use.