If you want to learn about a work of art, a symphony, a painting, a book, the work, if it's good, speaks for itself. You'd only look at the artist's life for details but it's not necessary. You can just as well analyze a Bach fugue without ever knowing he had 20 children.
The same way, if you want to learn about the Universe, look at the Universe.
It amazes me how many people think they know about the cosmos and its origins, without ever looking at it. let alone studying it.