I was thinking about the vague answers and I wonder if part of it is to avoid any issues. Sometimes on Twitter for example, you can post the most inocuous thing like "Roast chicken is the best" and someone will reply "Are you saying roast pork can't be good?" and without really knowing how or why it becomes a weirdly heated argument over something really small and trivial?
I also wonder if being as scrutinised as Ayu has been at the peak of her career and then when she used social media herself, means she has had to make the decision to keep a certain distance with things now to avoid headlines such as "Ayu does not support roast pork industry!!!" etc