> It is complicated, and even statements like ”access to firearms has been shown to affect suicide rates” are could be misleading because you could be putting the cart before the horse, if someone has chosen to kill themselves, it reasons they will chose a fast/painless, and effective tool.

But choice of method does affect rate of death, so it's correct to say that increased access to any method that's commonly used affects the rate of death. Decreasing access to that method is valid if its one of the measures taken to reduce suicide rates.