Some of us girls need help and some do not. In my experience, I did not need any help and it is my opinion that breast size is just not very important for my identity as a woman. Yes, breasts are gender confirming and many girls desire a fuller profile, which is fine for them.
For myself, I do have noticeable asymmetry, and I may get a BA sometime in future to even things out. I just have other priorities right now.