I am 9w1 and I do take stances maybe not always but I can be stubborn if I am convinced I am correct
Not sure why @Aylen didn't decide on a type but I don't think it's because she doesn't like to have conflict with others.
To me it seems more that she wants him to make his own decision rather than labeling himself based on her own opinion of him. So you can say she doesn't want her opinion to influence him and make him act like that type just because she told him so.
This is just speculation about her reason but only her know the truth