It has helped me learn things more interactively because I can ask questions and get answers without having to read 10 blog posts or a book before understanding things. For my personality, it would be hard to recreate without having a living mentor available 24/7 that had knowledge of everything I wanted to ask of it.
Does it get things wrong? Sure. But generally the subtle ways it might get stuff wrong would be the way I would subtly misunderstand things while learning. So, it's definitely not perfect, but "not letting perfect be the enemy of good" and all that.