If you understand the principles behind website templates you will immediately see the huge benefits to WordPress template systems. Basically it is designed to hookup automated template ideas to a system via which a client who knows nothing about anything can access your site (behind password protection obviously) and update and manage the website that you leave him.
Alternative Homework for Blog Owners: Look at your recent blog posts__are there any insightful comments that are worthy of being addressed more in depth in an article? I get ideas all the time from comments on my blog. Or look at your blog comment replies__do you find yourself writing an in depth reply to anyone's question about your post? That is often a good indication of a related topic that could use some more detailed attention.