The ability to display posts by Title, linked to the individual post is of great advantage when users would log to simply browse the site, and review information that looks interesting. As an example, movie reviews. If an entire category is dedicate to movie reviews, wherien each post is the review of a particular movie. Scrolling through a list of titles is much easier than scrolling through an entire text dump of the category.
Usability, for all sites is important.
