There seems to be a popular notion that "feminine" traits are innate and universal to people with a "feminine identity", rather than the product of culture with socialization that treats female people consistently differently than male people from birth. However if you think about things that prepare someone for technical success, so-called "feminine" traits like caring about your appearance more than is actually necessary (makeup and jewelry serve no real purpose and take time and money) or being uncomfortable with conflict (bias for cooperation vs competition, people seeing assertive women as aggressive) are not good things that will help you be equal to or surpass your male peers in technical pursuits.
I can understand why it's uncomfortable to imply that the concept of "femininity" is not a positive one when it comes to tech (the creator of this probably disagrees with my assesment). But I hope we can continue to question the validity of "feminine" social constructs while also creating products like this, which bridge the gap after socialization has taken its toll.