I am reminded of the story about ceramics students being told that half would be graded on quantity and half would be graded on the quality of a single piece of work.
In photography, you can get lucky. When I come back from holidays and review a thousand of random snapshots, a couple of them look great. Take 200 shots of a single thing, and one of them might be pro-level due to pure chance. Yet I'm not sure how well this "randomly great" percentage would translate to me playing the violin, dancing ballet, or writing a song.
After hearing this story for years and finally trying to source it, as far as I can tell it's not entirely clear this experiment was ever actually run -- and in fact is sourced in the link behind your link as a "parable."
I can imagine it's true that churning out quantity is its own education but I can also imagine there's a plateau past which deliberate practice and polish matter quite a bit.
https://excellentjourney.net/2015/03/04/art-fear-the-ceramic...
It turns out that the students who were just churning out pots ended up making the pots that were ultimately better.
I think there's probably something to be said for constantly creating.