The first draft is like dough–Make it first!!
The crucial thing is making it; without the dough, there can be no cookies. Once you have made it, you can shape it into a myriad forms.
In my early days as a writer, I would foolishly try to get each paragraph right before going on to the next, believing that once I started writing sloppily, it would prove infectious.
Nope, lay out the plan for the piece of work first! Absolutely. Know where you are going before you try to get there.
However, the same dough, with tweaks, can make muffins, pancakes, breads, cookies. It is important to make your dough, to get what you want to say down. Later it can be shaped into interesting Christmas cookies, and reshaped at will.