Adult Baby is about age regression, not minor attraction. Diaper Lover comes from so many places. A large number of DL people I know need them for unrelated reasons and use the kink to cope with being an adult diaper user. These kinks are lumped together because the venn diagram is close to a circle

Want to know why I know so many ABDL people? I'm disabled. I have a lot of disabled friends. We are constantly infantilized, especially if our disabilities are visible. It's no wonder people in that situation gravitate toward age regression.