You are able to maneuver much faster in case you need to make any changes, and generally without the knowledge of HTML or any other code. Try that with the regular webpage . No hosting fees, Wordpress and Blogger are for free and you can set up several blogs. Just a few points.
The blogosphere contains millions and people are always looking for new info. Also blogging makes it easy to build a readership something a website usually lacks. You also are able to get plenty of relevant backlinks to your website and when you reach the goal of marketing for your website you can start marketing your blog which would then make you a double threat in your niche. It is possible to take the first two spots in your niche if your willing to put in the work which would lead to double the traffic. The possibilities are endless and you are at a great loss if you are not blogging about your niche. The last thing-blogging does the same as article writing by making you an expert in you niche.