Basically different publications have different style guides or templates. Some places you do the type setting, others do it for you. Eventually the text ends u

Basically different publications have different style guides or templates. Some places you do the type setting, others do it for you. Eventually the text ends up as a pdf, and then that is marked up for corrections, revised, and approved for publication. You also have people of various skill levels using these docs. From MD/PhDs and lawyers all the way down to secretaries with high school diplomas. The only ubiquitous application between them is Microsoft Word.