These guys stress over a few extra ounces? 
I'd definitely agree that cutting essentials is a just plain bad idea, but I kind of get the ounce thing.  Things really add up.  As a preparedness kind of guy, I frequently load up packs that are tough to carry.  50lbs of gear for a 3 day hike probably isn't reasonable.  I've had to eliminate some redundancy, carry a little bit less clothing than I'd like etc. just to make it work.  There's got to be some kind of 
balance between preparedness and practicality.  Not saying I know what that balance is, but I definitely understand cutting ounces.  
For example, I bought some new gear this past summer:
Sleeping bag:  12 oz lighter than old one
Pad:            8 oz lighter
Raingear:       9 oz lighter
Pack:          15 oz lighter
Stove:         10 oz lighter
Headlamp:       3 oz lighter
Tent:          24 oz lighter
New Jacket:     9 oz lighter
Which amounts to about 5 and a half pounds of savings.  Going from a 35 pound pack to a 29.5 pound pack makes a 
huge difference. 
Sounds to me like they need to invest in a stair-stepper. 
Not to get on your case 

 but a lot of the ultra lighters I've met on the trail are in 
incredible shape.  In the case of "through hikers" (those doing a major trail like the PCT, CDT, or AT from start to finish in one hike), they're doing back-to-back 20 mile days for weeks on end.  They really do have to strip it down.  (having said that, no I have 
not drilled holes in my toothbrush and exchanged my knife for a razor blade)   
