As someone else pointed out, the news corner and performances are practically the entire reason that Hello! Morning exists. Without the opportunity to plug and promote new Hello! Project-oriented goods and tours, there is no reason for UFA to continue putting on a show at all.
The bottom line is that Hello! Morning is first and foremost a means to promote the girls and sell more product. All the fun and hilarity, while serving to draw all of us in, is almost incidental.
That sounds pretty cynical, but really, every show on television (with the exception of public broadcasting) is designed to make money, either through ad revenue or direct promotion.