Sure, you could absolutely focus on any individual characteristic or identity of any shooter, and then try to generalize that characteristic as "the problem."

Maybe this kid was trans, I don't know. But there isn't a correlation between identifying as trans and being violent. In fact, from data I've seen, identifying as trans is inversely proportional to committing acts of violence. Or in plain English, trans people are less likely to be violent than other people, not more likely.

But even if that were not the case, even if the kid identified as trans, and even if trans people were more likely (which they are not!) to be violent, the easy available ability of guns in our society is STILL the problem.

I mean, look at it this way. School shooters are overwhelmingly (and disproportionately!) likely to be young men between the ages of 15 and 18 who identify as cisgender and straight.

OK. So what?

Does knowing that solve the problem of increasing numbers of school shooting?

Of course not. But restricting access to guns certainly would.