Okay? Good for you I guess? I don't know if it ever occurred to you that there is a psychological barrier that most need to overcome in order to get the job done.
Pulling the trigger sounds easy on paper but it's likely much harder to do irl as a result of SI. To add insult to injury, some people also need to worry about how the way they ctb impacts their family and loved ones. This is one of the main downsides of more violent methods, like shooting yourself. A lot of people don't want to risk their loved ones (or anyone, for that matter) coming across the violent aftermath of their suicide. Finding a dead body can already be traumatic enough, but coming across a messy gory scene is significantly worse. Along with that, there is still a small chance of messing up and ending up horrifically disfigured and disabled. That one video that someone posted on here a while back, showing the aftermath of a failed suicide attempt via gun, really highlights this. His face was completely blown off.