Yeah I think there is a definite link.
I guess some people could also go through those things and not try drugs or not become addicted. So there is probably also personality as a factor.
I have suspicions my addict has borderline personalty disorder. He also has very nacisstic traits.
One of my friends has become a cocaine addict since lockdown. She says she uses coke to cope with the stress of every day life.. she is mum to a young child who it looks as if is on the spectrum, so quite challenging behaviour etc. She also had a traumatic early childhood where her mother abandoned her for the first 5 years of her life.