That's why we carry the man made stuff! Primitive man even carried coals as he knew in some conditions it would be tough and would waste energy.
And thus, the circular argument!
If I have man-made stuff, then why do I need a Bow n Drill?
Not my question, but, this is the way it normally goes.
Let me answer my own question.
Skills like Bow n Drill Firemaking would be more of a "sustainment" item, in my humble estimation.
If you did tip your canoe and all was lost , you would need, at minimum, a knife and some cordage to construct a Bow n drill (in enough time to warm yourself before nightfall).
OK, so, as luck would have it, you are prepared with a neck knife.
It is hung from your neck by cordage, (or has cordage wrapped around it, for those who don't like the strangluation scenario).
Now, we have met some of the conditions we CAN control by having a knife and cordage. Next are dealing with nature.
What types of wood are available?? Are they dry? What type of tinder?
Is it dry?
So, the next level is finding good dry wood, of the species necessary to give you a fighting chance.
Now, you set about fabricating your bow and drill. Hardwood spindle, softer hearthboard, your bow. Let's say a good hour has passed, you are getting close to having a workable Bow&Drill.
Oh yes, remember you are wet and cold.
Now, for tinder. More time checking around for tinder. No chances can be taken, this HAS to work, so you gather up as much as possible, and take the time necessary to make the best tinderbundle you can possibly muster.
get the picture? it's not impossible, and it's certainly better than giving up, that is no option.
But, I will submit this: If you are prepared enough to have that neck knife and cordage...why not a small fero-rod with it??
We all tend to pick and choose the scenarios and the equipment.
We always assume a knife.
In this canoe-tipping scenario we also assume cordage.
I think you can see where my logic is going. In a scenario like the lady stranded in Gila...... Let's say she had a BIC lighter and plenty of wood.
(She ran out of wood, actually). But, let's say we have a BIC and plenty of wood. We aren't planning on being out for 5 or 6 weeks, however, after Week 1 and no rescue, we say to ourselves, "Hey! I may be here a while!"
It is at this point that fabricating a Bow -N- Drill makes a lot of sense!
The bic is gonna run out of fuel, real soon, then what?
In my final analysis, just like Knives ,Axes and Saws.... there is a time and place for everything. While the Bow n Drill is certainly a skill , it is just another piece of knowledge that goes "in the bag o tricks".
It doesn't necessarily give you fire "at will" in all conditions, at all times.
In a survival situation, none of us can afford to be "One trick ponies".