You can use the parts that work and ignore totally the parts that don't work.

When I spot an error in an article I do not ever bother to correct it, even if it is a trivial uncontroversial spelling error. I certainly would not attempt to change something that needs references, even if I have excellent references and even if the current error is unsourced.

That's not how WP is supposed to work and any wikipedian reading that should say that WP is broken, but plenty of them don't and are happy with the status quo.