While you are at it, provide a citation for your claim that gangland shootings over alcohol sales continue to this day.
I won’t, because I made no such assertion. However, I can easily site mafia killing after 1933. Here’s a few:
“Bugsy” Siegel June 20, 1947
Albert Anastasia October 25, 1957
Joseph Colombo June 28, 1971
Joey Gallo April 7, 1972
Jimmy Hoffa July 30, 1975
Carmine Galante July 12, 1979
Paul “Big Paulie” Castellano December 16, 1985
Nicholas Guido December 25, 1986
Fred Weiss September 11, 1989
Anthony DiLapi February 4, 1990
Nicholas “Nicky Black” Grancio January 7, 1992
Then there were the two Sicilian Mafia wars in the 1960s and 1980s. The most lucrative racket for them in the 1970s was cigarette smuggling, not drugs.