I was just saying the same to a coworker of mine. Not to take away from the announcement of what seems to be a really great product, but I'm really confused why a lot of companies do this. It shouldn't frustrate/enrage me, but it does, almost as much as: Three. Word. Motto.
It's not the default for the blog software. Blog is usually as separate as possible from everything else about your site (which is good, because all the non-static blog engines have HORRIBLE security, especially Wordpress...)