She might need help learning how to practice. If she is saying it is too hard, it probably is true and she needs help breaking down the tasks. No one wants to feel like they are gettig stuck and that is how I feel when I practice piano because sight reading is not my thing.
It isn't tiger parenting IMHO, to set a firm expectation that piano lesson means daily practice. At the same time, if you, your spouse, and her teacher are okay with her not practicing then your friends should stay out it. There are many children who only touch the piano during their lesson.
