I don’t think anyone is preventing you from saying parenting might be a contributing factor, though. Say it as much as you like.
The only situation where I’ve closely observed for many years the parenting of a criminal doesn’t help, though. The criminal is my BIL (two prison terms for armed robbery), his parents my meek, well-meaning, deeply ordinary, law-abiding PILs, and their four other children (1) my kind, public-spirited, hardworking SIL, his twin (2) my other dull, decent, hardworking family man BIL, (3) my lazy, clever SIL, and (4) my lovely, high-achieving DH.
All law-abiding, other than a (failed) attempt by the clever, lazy SIL to get planning permission to convert an outbuilding by faking evidence it had previously been inhabited.
It broke my PILs hearts when he was convicted, and (they don’t live in the UK, but he lived and was convicted there) took on extra shifts to fund going to see him monthly in prison.
I can’t offer any explanations — he is the joint eldest and DH the baby, so he was already in prison when I first started going out with DH, and after a brief attempt at rapprochement when he was released and got married, he’s now cut off the entire family. I gather he’s on benefits, has very poor MH and has a lot of health problems, but it’s more than 20 years since I saw him.