You're hitting on exactly what I meant, though. You're generalizing from "it works for me" in a way that implies it's equally possible for everyone, that everyone's brain has the ability to look at something they decided to do earlier, and then just do it, without sending them through a spiraling decision matrix that factors in all the other things that have reemerged as possibilities since whenever they made the first decision.

It's so cool that your brain has this "decision persistence" feature. And it does seem to be common enough that it's treated as "typical."

It's just not remotely universal. Not all of our brains have this.