It is just a tool , like a book, a slide ruler, a pencil, or a map. None of these can give you the knowledge of the world, but they can help you on your quest. You can gain knowledge from using the Internet, but it is not as easy as a click of a mouse. Knowledge takes time, it does not come from staring at a screen. You must play an active part in the gaining of new knowledge.
Nothing comes easy and nothing is free.