Can we draw the following hypothesis from the context?

Context:

Rafael Caro Quintero (born October 3, 1952) is a Mexican drug trafficker who founded the now-disintegrated Guadalajara Cartel with Miguel Angel Felix Gallardo and other drug traffickers in the 1970s. He is the brother of fellow drug trafficker Miguel Caro Quintero, the founder and former leader of the extinct Sonora Cartel who remains incarcerated.

Hypothesis: The 1970s was a period of time where drug trafficking was lucrative
It's impossible to say