It was, and losing three of their "aces" in a week or so period.
I grew up on the west coast and got interested in WWII reading "The Big E", so had more of an interest in the PTO. Never had much interest in the ETO, as it was clear across the world then. Add to that Mom was Asst. Superintendant of Mail in Alameda during the war. Virtually most of the mail going to the services in the Pacific Theater went through there.
Really got interested in the sub side after reading a book that had the histories of several boats, ( Perch, Growler, Harder, Wahoo, Tang, Darter among them), and some of the recollecions of those that were lost by the surviors. Can't remember the name of it now, but was a super read at the time.