2e's design philosophy re: invisible abilities

While reading how to create monsters on AoN, I discovered this gem of advice:

Invisible Abilities

Source GM Core pg. 123 2.0

Avoid abilities that do nothing but change the creature’s math, also known as “invisible abilities.” These alter a creature’s statistics in a way that’s invisible to the players, which makes the creature less engaging because the players don’t see it using its abilities in a tangible or evocative way. For example, an ability that allows a creature to use an action to increase its accuracy for the round with no outward sign (or worse, just grants a passive bonus to its accuracy) isn’t that compelling, whereas one that increases its damage by lighting its arrows on fire is noticeable. These both work toward the same goal—dealing more damage this round—but one is far more memorable.

I.had recently watched some videos describing the upcoming changes to monsters in DnD 2024 and a lot of changes remove chance features such as camouflage in specific environments in favor of a flat, undescribed bonus. This change to that system didn't really sit well with me.

So when I found this advice for Pf2e, I was elated! I love flavor and I love the idea of making sure each aspect of the creature tells a story and isn't just a nebulous bonus or penalty for some reason. Kudos, design team! I love it.