My apologies, in context it seemed like you were implying that mental health was indeed easier to get help for in the other countries listed. Which I took to mean you were saying it was indeed more of a factor and not completely irrelevant. So I assumed you didn't think guns were the main problem from that. When they are indeed the main problem.
I didn't get from your post that you were also calling for gun control, for some reason it seemed like you were against it. Sorry.