IMO I think that to just have the knowledge, confidence, and ability to be able to create an ember is a major undertaking itself. Do I plan on getting dropped off in the middle of no-where, nope not in my immediate future. However I do spend a considerable amount of time in the outdoors and if I did need this ability I would feel better about knowing I can atleast or I have in the past created fire.
I do think that in a survival situation to actually think you will just grab up some materials and make yourself comfy, is not likely to happen. There will be a good amount of "suck" involved with it. However to have the self confidence of being able over time if need be fend for yourself and survive as comfortable as possible will increase your chances down the road.
Same for me just rattling on early in the morning at work.

"KEEP UP THE FIRE"