Breaking one rib is not so difficult. Breaking 10 in one go and causing a flail chest requires much more force.as described. Its an order of magnitude difference.
How exactly are we so sure that they were broken all in one go? And how much more difficult? If one of the attackers jumped on Lyuda from a height of say 4 feet that would be a significant impact and would cause a lot of damage yet you state that is not enough force to cause those injuries but a hit by an animal that is not proven to exist, whose capabilities are a mystery even if it were to be proven to exist has enough strength to do what a 180 pound man jumping from 4 feet height doesn’t.
I do not doubt that Yuri D was selfless and wanted to help his friends, but what could he achieve once he had climbed the tree given the state of his hands? Its unlikely he could have done much to help even if he wanted to.
Line of sight to the tent, if someone forced them out of the tent, him doing the only thing he was capable of doing at the time to increase the chances of his friends making it out alive would not be out of the question. If everyone else had a job to do, and he knew he was going to die, using the last few minutes of his life to get eyes on the tent or at least try to get eyes on the tent would be worthwhile, Afterall what else can he do if everyone else is working on another survival task?
There is no definitive evidence of the existence of big foot. This is correct. But an interesting question is why are there so many eye witness accounts and stories, tge foot print evidence is extensive. Why?
Why do so many people believe that the earth is flat? Why do so many people believe that there are secret alien lizard rulers? Why do so many people believe that the Holocaust never happened? Why do so many people swear on a stack of bibles that they saw Elvis at some point after his death?
Think about this what factual evidence is there that they were attacked by humans? Fist fights could have been amongst themselves due to stress of the situation. What evidence is there of outsiders being involved?
There has to be a reason why they traveled 500m off course and covered only a few km that day. There has to be a reason why they made camp in such an inconvenient and undesirable location. Their egress from their camp is riddled with contradictions, the only scenario for me that completely explains them is human involvement, armed human involvement. They left the tent in a state of panic but calmly walked down the slope. They left the tent without adequate clothes or foot ware and without tools and weapons. There is no indication that any or all of them were cowards or easily frightened so for them to be in complete state of panic inside the tent to cut it, leave the blankets they were holding behind, not grab a jacket or the backpacks they were sitting on and at the same time on the decent walk down in the same direction, calmly without a sense of panic or urgency for 1.6km seems to point only to external human attack. The tent inside was described as orderly except for the pile of boots by the door, the tent was not in a state you would expect it to be if 7 people were panicked for their lives and cutting their shelter to run away, the only anomalies that were immediately apparent were the 7 blankets that were crumpled up and the boots piled by the door.
The Tent indicates that there was no panic, they left in an orderly manner via the tent entrance where likely the first one out(Dyatlov) had his jacket on, put on his boots and went out to see what the problem was with Zolotaryov and Tibo. Once outside he was confronted and the rest of the hikers left the tent after putting on their boots. Once they were outside they were ordered to hand over their blankets, take off their boots and Dyatlov was forced to take off his jacket, the boots and blankets were tossed inside and the boots were dumped in a pile by the door. The hikers were ordered to march down the slope, at what point the fight happened is less relevant, what is relevant is that they walked down the slope in a calm and purposeful manner because they knew that the attackers weren’t the immediate threat after they were forced out of their campsite, the elements were the immediate threat, so they didn’t run, rush or separate simply because they expected their best chance for survival was together by the treeline.
The contradictions in their actions between say 10 minutes before the event that instigated their egress and their separation at the treeline provide evidence that they were scared but not in a state of panic and they were not fleeing their tent because of a threat there, they were leaving the tent because they were forced by someone. They knew that running would not save them and if the attackers wanted the dead they would kill them so they were careful on their decent to avoid unnecessary injuries that would make their almost hopeless situation into truly hopeless situation.