What's the point of language?

Generally speaking, we use language to communicate ideas and instructions to other humans. That's why language exists - because we can't read each other's thoughts, we use words to communicate the ideas contained within our brains.

So if we are thinking of something, at some point we need to communicate that information to someone else. In order to do that, we need to use words. And what is faster:

To have an abstract brain state and then try to convert that into words on the fly while talking to someone?

Or to format your thoughts in language to begin with so that when you need to communicate them to someone else, you already know how to?