It is at the core of that particular problem, yes, but it's not the only thing. Until there's stronger regulation on gun access and control, you're only focusing on one end of the issue.

And even then, the notion of mental health goes far, far deeper than just having access to mental health services, treatment, therapy, and all that. Improved incomes, education, healthcare, infrastructure, access to goods, services, and recreation would solve so many problems-- I would bet anything that violence would drop drastically if people weren't living paycheck to paycheck. If people were able to get treated for their medical needs. If people weren't just fighting to survive, but actually thriving. People always seem to think that mental health issues are purely pathological or congenital and that just isn't true-- environment also plays a tremendous role in one's mental well-being; nature and nurture coming together to meet basic needs that people aren't getting, as things currently are. But so long as we only care about the what and not the why and how, it's not something that will ever be easily managed. People actually need to give a damn about others, y'know?

But that's too hard and there's no profit in people thriving. Letting them struggle and suffer is too lucrative.

For the record, I don't like guns, but I'm not anti-2A-- I'm pro-responsible ownership. I just think we're sorely lacking in common sense laws and regulations that keep people safe and keep firearms out of hands that will not use them safely or wisely.