That's an unnecessary generalization. And you are wrong.
I certainly didn't need a fixed blade, but there are certain special operations units that would. I personally knew one such person who specialized in quiet takedowns of sentries/guards, and they generally recommended a fixed blade of 6 inches. It was thought that 6 inches would ensure hitting a vital organ no matter what the angle of attack was. Of course, this was highly specialized work, but this person was NOT a "Chairborne Ranger". Neither are the Ghurkas.
IMO
Of course Gurkha regiments are closely tied to their large khukuries that can chop the heads off the enemy when out of ammo.Surprisingly, these small stature guys never complaint about big o hefty blades they carry without problems in the conditions , where many other soldiers complaint about extra weight of pocket knife

, but this is the way tough Gurkhas are...,khukuries are league on their own, as well as their honourable masters within military.
Speaking of spec ops, or "black ops" as many may refer to, yes, members of some units within them guys, would have very different point on fixed blades and may find them necessary tools for certain assignments, there is no doubt about that, however last thing anybody may wish for is close quarter combat within reach of arm in this century, but hey, depend on tasks given, this surelly happens too...
Point most of guys made here clear, size and weight of the knife is an issue to the general military personnel,therefore most of them opt for smaller blade, often only pocket folder, even excluding fixed blade out completely,according to replies here.
when it comes to "Chairborne" rangers they also do exist,but sadly within higher ranks more likely
