There is truth. Truth is unknowable. There was an event that happened. That truth will never be fully known or understood by anyone. If I believed in God, I'd say "except by God." But with or without God, there is truth.
Then, there is the philosophical, social, and cultural basis of all of our lives, and that is narrative. We build self-concept, national concept, etc. based on narrative. We will never know the truth----though there will be A Truth, just one----we will never know it. But there will thousands and thousands of stories told about the events.
How those stories are told, what is stressed, what is ignored, what is elided, what is lied about, what is confused unintentionally, all of THAT will be gendered. We are always gendered when we tell our stories to one another. If I were Oprah, I'd say, "express our truths," but what it means is our versions. What I know about what happened combined with what I know about everything combined with my opinion about the events and my opinion of my audience, and then cast with the flavor of my skills and intelligence. That's my truth, my narrative, and in that I am gendered and so are you, my narrative will be gendered.
Does a narrative that says "men made an effort to save women" stress gender over-much? It's a valid question. Perhaps, in the service of telling this story instead of others, in that time and space are always limited and choices have to be made about what stories to tell, even over the back fence to your neighbor, stories about women who were heroes to other women, stories about men who were heroes to little boys, stories about men who were cowards, women who were cowards, etc. will be obscured.
A good question to ask is: who cares? does it matter? it might. I can't honestly see how right this minute, truthfully. Our world is full of overly gendered stories. This will just be another. I don't think it will cause more boys to do whatever or more girls to do whatever. People do what they do to survive when survival is on the line. Those men were not able to construct a narrative that did not include saving these women. These women were not able to construct a narrative that did not include accepting that help at the expense of their partners. The shooter was not able to construct one that did not include killing these people. I don't really think it changes that much about the next time someone kills someone else.
Still, it's a valid thing to talk about and look at. But, never forget that there is only ONE thing that happened. And no one will ever know what that is. No one.