Id tend to think it was something along those lines. Us knife nerds tend to think knives are/were way more important than was the case.
As for being required to carry what was issued; While a lot guys carried knives (obviously, since millions were made), the powers that be most likely were more concerned about supplies, ammo, shells, refitting the Yorktown, island hopping and Fat Man.
Yes, yes, yes. (Bold/Italics above by me.)
I grew up and went to work in the 60s with a lot of WWII and Korea age vets. NONE, yes... NONE of them saw a knife as anything other than a tool. Of course, I was horrified. They saw the KABARS and their like of military issuance as damn fine pry bars (used the KABAR to open ammo and other crates), digging tools when the shovel was lost or the ground too frozen to dig, an emergency stake to hold down their shelter half in a storm, a cooking tool, a hammer (the butt), a chopper for all manner of materials, a board splitter to make a small camp fire, and everything else that the knife was actually designed to do for the everyday soldier's needs. All agreed that it was a great piece of gear, but never really thought of it as a knife. And they weren't issued any kind of sharpening tools (Army... no "survival knife" setups), so they literally left them behind when the blades were damaged or really dull.
Fast forward. A good buddy of mine is a retired Sgt. Major from Special Forces. (Not an ounce of bravado in him, kind of a thoughtfullness...). We chatted a lot about the role of knives in his 27 years of service, and he felt the same as his brothers from previous conflicts. Knives and bayonets are tools, and they could have called it anything they wanted, but it was still just a tool. His thoughts and the way he trained his "students" was that if you were close enough to rely on a bayonet or a knife, you were screwed. They all learned basic knife skills, but according to him, his basic knife skills were only to disarm someone that has a cutting tool, or if it was a mission critical piece of equipment. In the "mission critical" arrangements, he assured me that the point was the only thing that needed to be sharp on a knife. !!!!
He thought from his time at the end of the Vietnam war and the Middle East (and other) conflicts he was personally involved in was the issue of the multitool as one of the most valuable pieces of utility gear he ever had. He thought that was the most practical thing they could have given the troops for all the obvious reasons. Being an "in the field" kind of guy as he put it, he never carried a big knife of any kind unless it was for a specific purpose. He did carry two different sizes of multitools, though. Oh yeah... he did make off with a couple of KABARs during his service. One has a sheath, one doesn't. He uses one in his garden (old habits never die) and the other one he is keeping safe since it was the one he had at the end of his career.
His one tool he considers a piece of cutlery? A real knife? His CASE brand stockman carried and given to him by his late father.
Robert