No, this is not really an argument nor are the comments by myself or FrozenLVFan "accusations." In all due respect, you are indeed misinformed about concussions and concussion protocols and are stubbornly ignoring information that has been offered to you. I say this not to get into a pi##ing contest but because you indicated that you have managed athletes with concussions (in some capacity).
As for upper body strength, there is some belief in the sports medicine and athletic training community that strengthening neck muscles can the lower risk of concussion because it limits the degree to which an athlete's heads snaps back on contact. This theory does not have a lot of data to back it up but, like chicken soup, it can't hurt.
Your emphasis on upper body strength seems tied to your belief that concussions are only caused by floor contact and hence if athletes don't hit the floor, viola! no concussions. [By the way, core strength and lower body strength are much more essential to sustaining balance after contact]
But, I have seen athletes concussed by head to head contact, head to ball contact (mishandled headers in soccer), head to knee contact, and head to shoulder contact. In the case of Massengale and her head to hand collision, again it is all about angles and force vectors. You may have noticed that she has had numerous collisions and falls to the floor this season with no concussions. In the game last year, unfortunately, the force of her motion going forward and the angle of the hit in the opposing direction was just right (or wrong depending on how you look at it) to create a concussive impact.
I understand this is a message board and the code is all about macho posturing and never admitting that you could be mistaken or have misunderstood a complex issue. Fine, defend your "women get concussions only because they fall down" opinion to your heart's content. But, for chrissakes if you have responsibilities to other athletes as a coach etc., please find a seminar on concussion management or at least do some reading on the topic.