I think the intent was to communicate that abstractions aren't always right. Some people might think that because there's duplicate code and that the abstracte

I think the intent was to communicate that abstractions aren't always right. Some people might think that because there's duplicate code and that the abstracted code maps to the duplicated code 1 to 1 and leads to fewer lines in total, it's a good abstraction, not realizing that there are costs to doing this that may not be aware of.