You're missing the point of his post - he was saying that while path recalculation exists, it's hard to make an AI that makes proper choices when it comes to following the current path and creating a new path - especially when it's opponent can also modify the available paths in the future.
I'm saying that players have come to expect that issuing "move" will make AI take the shortest path without destruction, and we know that if there is a faster way, we have to tell the AI to attack through the wall if we want to break it. I guess the TL;DR didn't cover that though.
