You are projecting a modern definition of “happiness” onto Aristotle. Think of it instead as “thriving” or “reaching your potential in all aspects of your life.”
Uh, yes. Cause the premise of this article was why we as modern people we should appreciate Aristotle's reflections on happiness, not why I should appreciate the meticulous perfection of the internal logic of his world view.
In my opinion, either Aristotle should've broadened his view of "virtue" or "happiness" to not worry so much about personal weakness or vice. Or his notion of these aren't really worth taking up as a modern measure against one's life.