This was a painful read. Legend, here's the problem and the point no one is mentioning. If someone had the same physiology as that little girl, was sitting in the same position, at the same time, and had the same survival skills it would be logical to conclude that they likely would have survived just as well. Likewise, we can conclude based on this, we know that force users are super humans in that they can use the force. Some force users, via better control, or higher potential can use the force better/stronger than their peers.
If Obi Wan has taken similar hits as Aryn Leneer and less damage it can be said that he has better force reserves, more power, or more control. Either way he is capable of mitigating more damage which provides him more durability. We can conclude, based on logic, that if he was hit in the same way as Aryn Leneer he would probably take less damage. This would be a logical conclusion based on the evidence at hand.
The little girl surviving the plane crash is a testament to her knowledge of survival, her pain tolerance, and her seating arrangement in proportion to the people around her. It doesn't mean, had she been sitting in any other seat, that the outcome of her survival would be the same. Likewise, most people with the same injuries, probably would succumb to pain or even infection. This would make it a logical conclusion to claim that she has higher pain tolerance and survival skills than most other people, possibly even some/most/all of the other passengers.
This doesn't prove your point but only reinforces theirs.
It's stupid to think that Obi-Wan must be better than Aryn just because he took a hit better than her. If we look at the actual attack:
"She was unready for the blow. The Force-augmented impact exploded a spark shower in her brain and sent her cartwheeling away from Malgus; she slammed into a rock and landed on her side ten meters away. Adrenaline pulled her to her feet, though she swayed unsteadily. She spat a mouthful of blood and held both lightsabers at the ready."
Not only is Sunrazer lying about the attack being from hitting a rock, as that isn't made apparent, but we can see that Malgus augmented his punch, while already being strong enough to kick someone across a room and through a pillar and being stronger than Aryn who can toss Malgus 20 meters with one hand, with the Force. I don't think I need to remind anyone of how powerful Malgus is with TK and explain why taking that kind of hit directly to the face, notably without being ready for it and therefore unlikely to have defended herself with the Force, would be kind of a big deal. I mean, we're talking about a man who fodderised a Jedi who was busting multiple buildings.
Furthermore, while Obi-Wan could have used the force to cushion his impact with the wall or protect himself, Leneer clearly wasn't able to since she was surprised and stunned, "exploded a spark shower in her brain", by being Force-punched in the head.
Also it's not like Kenobi hasn't been knocked out by a single kick from Ventress or a myriad of lesser attacks at other times.
Also x2 this whole debate is entirely pointless since Sunrazer's feat of Kenobi hitting a wall hard enough to buckle the hydrofoam permacrete is...... entirely non-canon. 😐
So thanks for wasting everyones time.