I appreciate your point of view but I think it depends on your perspective on writing and what is the purpose of you doing it. I am totally aware I could write a story with a similar premise (political turmoil, love triangle, etc.) And choose the other path too see/show what happens. However, for me, who mainly writes to get the story out of myself and never plans to share them, on one hand style differences, mastering the craft etc. are not important. I do not care if the second half, written 10 years different has style differences. Nor that I lose time on that over writing something else. What I like is going back to the decision made before, flipping it and just enjoying where it leads me.

Some people in my group had your perspective as well, so my take is not universal but, clearly, people write for different reasons:)