Easy to watch and critisise, but whilst i could skin a deer with a knife, a flint might take learning.
And preserving meat?,, smoking is it that easy?
cooking utensils? Build a trap for a pig ? how, a pitfall? .. kill once caught, how, sharp stick?
Flint is a superb material for many uses & flint knives are very effective, in fact i have seen flint used to do every job on a Reindeer carcass that they would be expected to do, and then used different shaped/sized flints to create pickaxe heads from antler, strip down a skin, make needles, buttons, toggles, strip sinew & tendons & even carve out a small bone to produce a whistle type instrument.
I was told that until the Mousterian period (middle Paleolithic) flint was not shaped as we know it and they used it as found, after that it was shaped or knapped into smaller sharper specific tools, and from this progression skills progressed, however not all camps or settlements had the same evolutionary speed which is why we think some tribal dominance surfaced, which some evidence suggests may have led to Cannibalism..(not sure if C5 will let that run...)
Smoking meat (that is if they caught any, those most successful were semi nomadic so followed the migration) is again easy as MS says, its knowing the correct fire heat, type of wood & length of time needed to preserve, that requires the knowledge, as far as clothing is concerned, some of the most beautiful products made from animal skins require lots of time & knowledge & skills handed down generations, but the basics using skin, sinew & tendon a small knapped flint and wooden/bone needles should be expected as the very least.
The making of utensils for both cooking and collecting are an art in their own right, from skin bags to bark bags & containers, reeds & grasses woven into baskets, bags or traps and even skulls all used to carry water and food or collect water/other liquids such as saps honey etc and food..living from day to day is not the same as existing in a well organised knowledgeable community, it is these little details that make for survival of a tribe or clan..
On the subject of food collection many of the hunter gatherers and indigenous people were far more aware than we are today as to the seasonal bounty, what is edible and where to find it, they would i expect also have better time management skills!! be stronger, hardier & much more attuned to the surroundings, they would also not be put off by a few fly's or maggots and would not pay too much attention to use by dates..!
Having spent time in some odd places with some quite interesting people i would say that until you are put into the uncomfortable position of being dependent on your own skills & ingenuity in a very unfamiliar world then criticism should be limited, as without doubt even the 'I could do that easy brigade' will make any number of schoolboy errors in as many hours.
It is easy to use a fire steel, and some maya dust.. next time your out in the woods in the rain just strip to your pants & try to light a fire with flint & iron, not steel...and see how you get on..I would expect 95% + of you fail to keep warm..