Why would you waste your time writing the wrong story?
On the subject of multiple drafts: drafting and re-drafting should not be confused with EDITING (which is a very valuable and necessary process). I define drafts as rewriting the same story in its entirety over from start to end. I spend a significant portion of time thinking about my story so that when I sit down to write I know what needs to be written and how it needs to be written, where form is as clear in my head as content. I could maybe understand writing a second draft for one or two books in a catalog of a dozen. But I cannot fathom why I would do this for every book.
If you aren’t writing the correct story STOP WASTING YOUR TIME WRITING THAT GARBAGE and go back to the drawing board.
I don’t care that Hemingway said you should write 30 drafts of something. I think that if you NEED to write 30 drafts some something, there is a fundamental problem with your process such that maybe you should spend a little more time thinking about your story before you sit down to write it. But then again, I’m not a fan of wasting my own time.