I was poor, grew up in social housing.

I did not use drugs.

"I share needles because I can't afford my own" is an INSANE take. Don't shoot drugs in the first place! Poor people are normal humans, they have willpower, agency. It is a rich people myth that poor people are cattle, devoid of any chance of doing the right thing.

It is culture, behavior, social norms. Being poor does not force you to abandon the nuclear family, does not force you to engage in criminal acts. (there is reverse causality though)

In the early 1960s South Korea had a per capita income lower than those of Haiti, Ethiopia, and Yemen, and about 40% below India's. Did all South Koreans become heroin addicts with HIV?