Not true. Logistics is what wins a battle. The "whores" will give the soldiers a reason to fight, but the soldiers need support in the form of food, shelter, communications, supplies, ammo, etc. One big problem with the youngest few generations is that they grew up in a disposable society. They think if something breaks, you throw it away and get a new one. Well, that won't be possible in a SHTF situation. Having people around that can fix (or build) vehicles, guns, electronics, generators, etc. will be invaluable. Those of us with those kinds of skills will be well taken care of.
Sorry, but what immediately leapt to mind was the half-pint half of Master/Blaster from "Mad Mad - Beyond Thunderdome", stuck in the underground pig factory. But I guess in SHTF times a jobs a job ;-)