Kyle, yes, by extending the front left of the green forward into a narrow tongue, any hole location there becomes very difficult to get close to unless a perfect shot is hit.
Is it even 12-15 feet wide? If the left side was left as rough then many shots played, especially by the lesser skilled players would bring out very high scores and a slowing of play.
Please understand that a shot played from this bunker shot isn't an easy one, but it allows for a greater chance at potential recovery for shots from left of the putting surface especially with that front left hole location.
The end result is a relatively easy par-three now having many more options of set-up and shot options and a greater challenge for all.
The bunker is in place because of the design ethic of fair and challenging rather than make it easier.