Practice can make perfect but practice should also lead to progress. If not, it doesn’t “make perfect.” Too many times, you want the writing to be perfect but forget that writing must also lead to something. It must also have a purpose in order to make you a writer.
It is great to know that you can quickly whip out many words. You can let the muse flow and fill page after page with words that can be eliminated or not go anywhere except into writing practice. But never forget to also have a project going that also has a purpose.
If you don’t have a writing project, select something today that you can write with a purpose; something that has an ending to it. Write with a purpose and a focus so you know that your writing matters, that it has a reason to exist. What writing project will harbor your writing purpose? When will it start, where will it end?