[Frank Sheed]

Bingo! The family used people’s vices as a means of income; they were going to drink or gamble anyway.

The Solazzo thing with drugs turned off Don Corleone who saw it as a different means of corruption. That went against the younger, greedier Dons who didn’t emigrate here and go through the hardships he did as a young man. That is why they tried to bump him off and lead to “the mattresses.”

[GunRunner]

The old school Dons were very much against any dealings in the drug business, like Paulie in GoodFellas. Drug dealing convictions usually meant long prison sentences for mob leaders, whereas women and gambling did not pose the same risks.