this does happen but far less frequently than you suggest.Cycle of child sexual abuse:
Researchers M.R. Hilton and G.C. Mezey discovered that there is a progression from victim to victimizer, as child sexual abusers often report a cycle of sexual victimization.
This is particularly common in pedophiles whose preferred targets are little boys.
Hilton & Mezey make some further points:
1. The more deviant the patient population, the higher the rates of past victimization
2. The choice of victims is dependent on the victims' physical characteristics, including age
3. There is often a tendency to abuse the victim in a way that replicates the offender's own experience of abuse
https://pubmed.ncbi.nlm.nih.gov/8894189/
as shrinks learned over generations of analysis, an inability to cope with mom and/or dad push them to the easier to deal with.
Not sure why DL needs someone to "blame" but thats his thing and he's free to feel as he does.