Each begets the other. Trauma and abuse is in many ways (socially) hereditary but often enhanced by neurodivergence. In a brain with sensory sensitivities outside the norm, connection can be difficult (even between ND people), and from that disconnection often arises the sorts of overwhelms in both caregiver and child that make for neglect out of overwhelm or explosive situations.

Couple that with just plain generational trauma - physical punishment that ND people are more sensitive to, the high prevalence of CSA, and a world that doesn’t even try to make any accommodations and you find it more rare to find neurodivergent people who are untraumatized.

One result mentioned here but worth highlighting is the capacity to dissociate and the existence of dissociative disorders. Many people in this cohort also find they have the ability to structurally dissociate as a coping mechanism of last resort - an outsized percentage of people diagnosed with OSDD, DID, and DDNOS are neurodivergent, and among social groups of neurodivergent people often dissociative people will tend to attract - it’s nearly to the point that “capacity to dissociate” could itself be a neurotype. Anyway it’s a fascinating line of study, and if I didn’t have folks w dissociative disorders in my life I might doubt their existence.