I think it's more that they didn't have the display language to mark those inaccessible parts of the world as "boring", and prevent the player from wanting the walk into that invisible wall in the first place. Or placing the invisible wall 1m infront of a real wall for NO REASON.

While also expecting you to go around searching for hidden goodies nd secret paths.

I swear, the invisible walls are the only thing pushing it to a 9/10 from a 10/10 for me.