That's funny, that's almost the entire emphasis of the IDF and the Krav Maga training. Multiple opponents and unspecified weaponry. Bursting. Etc. And that model is closely reflected in SAS, and so on.
What you say does have an element of truth though, as easily 75% of the consistency of elite military training is in operations; detect/evade, communication, stealth, intelligence, languages, etc, etc. But you have to also realize that it takes millions of dollars and countless man-hours to train a single individual to be combat ready at that level, and that they're not going to just 'gloss over' the hand-to-hand aspect, as that would be an unacceptable risk to run with investments of that magnitude. No battle plan survives contact with the enemy is an old but well respected maxim. For this reason, basic direct-contact combat training is integral to the survivability of these men. Above all, the psychological development is to become a singular implementation of death, with zero respect or compunction for the human life that is unlucky enough to be their target(s).
Strangely enough, you see the result of the differing psychological profiles and even moods, in unexpected results. How many times have you predicted that one fighter would win, having obvious advantages in training, style, or raw stamina and strength, yet the underdog would just will himself on to victory regardless. That's only a fraction of the kind of drive that exists in men who prepare for a career serving their nations at the very probable cost of their own lives in the event of a serious engagement.