I watched The Mule last night. I don't know why Eastwood chose his character's involvement in a drug operation to convey the moral of a negligent husband and father. Certainly, there are any number of storylines that a talent like Eastwood could have pursued to get the film's message across.

"Generosity. That was my first mistake."
"Experience must be our only guide; reason may mislead us."
"Instagram is Twitter for people who can't read."