I'm involved in a few different online communities through a hobby, which attracts a wide range of age groups, mostly women and older girls. Many of the younger ones identify as queer, enbyvetc. Over the past few years, the concept of found families seems to have mushroomed. Many girls and young women, whenever they have arguments with parents (for whatever reason), are told by their peers "you have us, we support you, we are your family".
The thing is, these girls and young women can't seem to deal with conflict in any shape or form. They don't have resilience or the capacity to deal with any negativity in their lives, no matter how small. So the idea of total acceptance must be very appealing.
Primark are cynically tapping into those feelings and amplifying it.