LogFAQs > #978803153

Yellow paint isn't quite as nice as making good use of lighting and shadow to highlight where the player needs to go, but it's definitely better than press r3 to follow the dotted line or follow the arrow.

Ultimately, though, the yellow paint is a temporary Band-Aid to a larger problem which is environments that are still underwhelming when it comes to interactibility. Breath of the wild didn't need yellow paint because you can climb everything. Assassin's Creed doesn't need yellow paint because they make every building into a rock climbing wall. There are other approaches that can work, but when the player is forced to play this guessing game of "can I or can I not climb it" that's when the visual aids become necessary.