Although I agree that she should place her health over her work, I also agree with the article saying that Morning Musume might fall apart if she wasn't in it. Sure, Aruiteru was a good one, but still, what about the singles after Aruiteru? Can we guarantee Morning Musume's success after seeing Aruiteru? I think not. Not only that, Yossie's like, the only comedy master left in the group next to maybe Miki. So that's a huge blow to their talk shows if Yossie decides to graduate now, considering the other members aren't as outspoken as she is. What I had just said is probably one of the burdens she's carrying: wondering the possibility of MM's future if she were to go.
Nonetheless, if her health gets any worse, then yes, I will support her decision to graduate.
EDIT: I did not intend to sound like I'm disrespecting any of the other Gatas or MM members when I say Yossie is what keeps them up. Don't get me wrong, I love them all dearly, but I also honestly say that I don't think most of them can uphold a good interview if they are too shy or something. So y'all, forgive me if I sound like I'm setting Yossie on a pedestal the other members can't touch.