Yeah. I agree with the post above from personal experience writing tends to take a position in concept, journey, and ending. The concept defines the setting/possibilities/tone & flow of the story, the journey builds and evolves the plot, and the ending is a close to that journey. After writing for a bit you begin to get a better understanding of the type of writer you are and having an ending in mind helps steer your journey to how you wish it to end.
The same is said about the opposite. Without an ending you let the concept steer your journey into an eventual ending that naturally appears.
I write based on what I want to achieve, i personally like establishing some specific msg only question I have is how do I want it to be delivered through the journey or the accumulative end. This drives my style of approach.
If I decide to go with the journey I build onto the story until I feel my world and msg has been properly established and did what I wanted it to do. However if I go more toward the end route I analyze and justify if enough was in place to make the ending as meaningful as I wanted it to be.
For me having a predefined ending does not set in stone how your story can end it just gives an out line for what you want. On the other hand not having an ending defined allows for more freedom and character development because your no longer thinking about the ending but the next step your story is gonna take.
This is biased to my writing style