To stick to the analogy, I could polish a rock I found in the ground for months on end, trying to get a diamond like the one EndMaster found, yet after all that polishing my rock would still be an emerald underneath.
In other words, some people aren't capable of writing 8-rated storygames and realise that. I do see your point - only publish your work when it's the best you can do - but for some people their best is only a 6.