This firewood question is not clear! Seekers also have statements that say that the branches cut from the cedar were unsuitable for burning. And they thought there was a different reason for cutting them off. Some cut branches remained stuck on the tree on the lower branches! What is quite strange is that someone invests energy in cutting the branch with a knife and then simply leaves it without any use! You can also read an opinion from the searchers that there were dry branches nearby that could have been burned and that hikers did not have to climb the tree at all.
The Gyatlovs never hint that they should climb trees for firewood! On the 31st, he also complains about the lack of firewood and they start a fire from wet pine. It is not valid to pretend that the lack of tools would prevent a processing operation that would preclude them from being able to start a fire without climbing wood.
Cutting,
Stack,
Splitting,
Storage,
Drying
These are the alleged operations that, according to your claim, prevent them from starting a fire without climbing trees due to lack of tools. Among these operations, splitting can be problematic, but for thin branches it can even be solved with the knife, along with the other operations! Or you can just skip this operation! Justifying tree climbing as the only option with these is not valid! Why can't they dry trees near a fire? Why should they store it and why couldn't do that? Why can't they cut it, because that's exactly what it's about, they cut the branches? And why should they cut up the tree, they can even put it away if the part in the fire is already burned! Even wood split with an ax could only be dried near the fire in the same way as thin branches.
Of course, they would have had an easier job with an ax and a saw, but these tools do not change the wet state of the trees. They were capable of starting fires under given conditions. It's lucky they had matches! Apparently, this is why the searchers found burnt pieces of clothing and handkerchiefs. Those were the accessories for starting a fire!
There were different trees being used for different applications.
Suitable wood for burning is not as simple as putting a match to any piece of wood that you find or pick up. You have live trees , dead standing trees , green wood , wet wood , wood on the ground, moisture, rotten wood . Then there's the season , winter , summer etc.
We are in a winter scenario here, with no tools restricted visibility and snow covering the ground.
The small trees cut or snapped are not suitable for burning , live and green , these are used for insulation for the ground, the only dry wood available without tools are the weathered lower branches of a cedar , hence the advice in the manual. Small twigs are needed to get a core of claim going but their should be resin in the lower cedar branches too , especially where it branches out from the trunk.
The branches that fell and remained on lower branches are probably the result of them getting caught on the lower branches after being broken. These branches won't have been cut with a knife , rather the physical weight of the person on that branch by pulling or whatever means, it is to break or snap the dry branches , not a live branch, those would bend.
There are comments about there being more wood but we don't have the context of who said it and what wood this was.
You could maybe use other wood on an established fire but you need that established fire to burn this other wood , especially if it's wet or been on the ground. You will actually kill your own fire other wise.
On the 31st they had all their tools , axes and saws. It takes an hour or two to process the wood for a normal forest camp under controlled conditions . They could afford time to process that wood and get the dry parts for burning.
They can't dry trees near a fire because you need the fire to dry trees , you need saws and axes to process the trees , as in cut them into manageable sizes.
I don't know what you mean about storing wood.
A knife is not going to be able to split trees, the dead wood on the ground if you can find it would need split open to get the dryer middle exposed , you can't just throw wet and frozen random tress on to a small fire, there's steam from water fighting against the core heat.
The young frozen trees are easier to break and cut but are of limited use for burning , the cedar branches are hard and dry.
It's why all outdoor manuals tell us the same. It's why Mansi and people today process wood for burning .
All the hikers have is the clothes they stand in and a knife in a frozen snow filled forest with the clock of hypothermia ticking away.