In my experience, most of the insights cluster in two places: just as you start writing your solution, and just as you think you're done with it. So you want to get through the whole process quickly, just to learn the things you need to write a proper solution.
Related, from a different HN thread - https://news.ycombinator.com/item?id=27692710 - "action produces information".
that's not really what a rewrite is. A rewrite is when something has already been in production, and the engineer re-do the same feature set, but refactored or rewritten in a different (possibly better, but not guaranteed) form. This rewrite takes up the time that would've been spent on something else.
If you were doing a "rewrite" during implementation, but still delivered on time, that's not a rewrite - that's just good engineering, doing exploratory coding! If you couldn't deliver on time because of the rewrite, then i guess you can call it a rewrite.
Throwing away a whole repository that was tested and running in production or on some dev environment, is something different in my point of view. And I think that's what people mean by "rewrite".
In all seriousness, from a business standpoint, it's almost never worth rewriting anything unless you're already making significant changes to that code. The opportunity cost of not spending that time building things that get you paid is just too high—not to mention all the new bugs that you're likely to introduce.