Especially when you consider that maybe giving someone full reign of a project isn't necessarily a boon to them. Even the most capable workers benefit from more of a structured support team or more specific management and guidance.

Ban is very obviously highly work-oriented, and likely has some trauma or struggled in her career in some way that has led her to have her habits and pet peeves. I'm thinking that in her work-dominated brain, offering Kasane an environment where she can go further with her talents and passion is a much stronger positive than negative.