If only it was as simplistic as some people make out. Parenting in some cases may contribute but not always. How do people explain one child who commits murder and yet all the old kids raised in that exact same house, exact same parents, never put a foot out of place.
I know a family (not overly well but reasonably), 2 brothers, only a year between them. Younger 1 is a fantastic person, fully law abiding citizen, no issues.
Older 1, got involved with drugs, convicted of one murder, suspect in another before being murdered himself.
Exact same childhood. His parents tried absolutely everything from around when he was 14 to try to change the road he was going down. Therapy, educational support, rehab, real love, tough love, consequences, everything. His poor mum nearly dying trying. The poor woman is in her 60s but would pass for 80s. She's had cancer & other health stresses too. Her husband is a shell of a man, barely even speaks anymore & clearly depressed.
The only difference between the two boys was sport & friends. One got heavily involved in sport & had a good set of grounded friends. The other drugs and friends like himself, constantly in trouble, long before any drugs came into play.
Not the parents, not the other siblings. There isn't always a neat little explanation like we would all prefer.