The same applies to fluff software, but only to fluff software. If you have to create a page with a dozen buttons with a bunch of click handlers, hook those up to basic AJAX calls, then yes, you can speedrun that as well. Because it's extremely easy work that involves no thinking.
Many things in life are kind of mundane and tedious. Fake school work, taxes, cleaning, ironing, to give just a few examples. And having strategies to blast through that kind of work effectively is useful. But these strategies absolutely unhelpful when you're trying to do anything creative or difficult.
You can't write a great spy novel with an outline like: 'introduce spy character', 'successful mission 1 in present time', 'flash back to failed earlier mission', 'introduction of big bad guy', 'flash back to tragic backstory', 'spy gets assigned special mission only his handler knows about'. Filling out an outline like this produces an uninspired, boring, formulaic trash. You end up with bad airport reading, the equivalent of AI slop.
To give another example: PG spends MONTHS on a single essay. He is not bottlenecked by a missing outline. Speedrunning the wiring process doesn't help. Figuring out exactly what you want to say is the hard part. Putting words on paper is trivial in comparison.