The inciting event is a critical part of the story. It is the defining moment where your protagonist is drawn into the core conflict. And its placement will vary depending on what genre you write and how much setup is needed beforehand. But one thing holds consistent, it always happens somewhere in the beginning.
Your opening scene determines whether people will read your book or not. If it doesn't capture your reader's attention in the first couple pages, they'll likely put your book down and find another. With the speed of today's world, people no longer have the time or patience to wade through a slow beginning. No matter how engaging the rest of the book is.
It can be difficult to tie up all your loose threads if you can't remember them. Outlining can help you pace your ending and keep the event order straight as each unfolds. Think about your climax's impact and how everything needs to come together for a powerful ending.
Every writer's process is different. Some might start writing with the barest of structures, some might outline every point, and some might not apply structure at all until after their first draft. But it's a lot easier to write when you know where you're going.