It's naive to think that's the literal meaning.

I didn't think it needed spelling out that they were saying "I read this book, I understood its message and was able to incorporate it into my life with notable results, so I am better at quitting or avoiding addictive behavior"

Rather than respond to you directly, I'll quote more from OP (a sly maneuver, I know):

> If that [Power of Habit book] was taught as a class in high school, it might eliminate long-term drug addiction.

No.

The book "Power of Habit", while incredibly valuable and informative, will not have this effect. If you believe otherwise, you have no understanding of the root causes of long-term addiction.

You’re being aggressively literal here. It comes across as an insecure need to “be right” rather than interpreting OP’s comments generously.

Uh uh. They said what they said. What they said is aggressively incorrect. No amount of generosity is going to change that.

What about when they wrote

> If that was taught as a class in high school, it might eliminate long-term drug addiction

This level of lack of empathy or insight into other people’s lives causes me borderline physical pain.