I can agree with the quote attributed to the Navy Seal, as that would be normal for some type of units. Airborne units, Air Mobile units are good examples of units who cannot always be assured of timely resupply. They are in between regular ground pounders and specialized units. Units like Seals start out with a lot of firepower, and don't like to be stranded anywhere if at all possible. If possible, they want to get in, do their thing, and get out without contact. Granted, that isn't always possible and things then may have gone horribly wrong. Special Forces are more like Seals, and Delta Forces are more like Airborne, but different.
Regardless of what plans are made, if in fact things do go horribly wrong, I would think hand to hand combat training would be a handy backup. I can't imagine giving MA training just for mental toughness and esprit de corps. There are other ways to do that which are frankly probably more effective.