Isn't it interesting that tons of people own guns in America and DON'T shoot people? Or the fact that we had crazy people and assault weapons previously without mass shootings.
Looking at these issues as if they're either-or is ridiculous. Of course you're going to need a multivariate approach. You're not going to get rid of the guns, and you're not going to get rid of crazy people. We need to address gun laws, mental health laws, and societal collapse overall. There's no singular approach that will fix everything.