There are some who think you can either write well or write a lot, but you can’t do both at the same time. I disagree. Just as it takes practice to write well and practice to write fast, it likewise takes practice to turn out good work quickly.
However, I wouldn’t recommend pursuing both at the same time. That would be insane. First, focus on quality and then later add productivity to the mix. Of course, we will always need to strive to improve, so don’t wait until your writing is perfect before you try to interject a speed element.
But what you definitely don’t want to do is pursue quantity before quality. All that will do is allow you to churn out bad content faster. And that’s not good for anyone.
There have been times when I wrote well but slowly; there were other times when I wrote quickly but not so well. Now I’m working on doing both at the same time.
It takes practice. There are no shortcuts or easy buttons, just practice.