Having the option, and knowing that option will likely work, be painless & peaceful, brings hope. Since death is the ultimate finality of life, & humans have a natural SI, the thought of ending one's life in an uncertain & possibly painful manner is something that causes a lot of anxiety. Once someone knows of a method that alleviates that anxiety, that is when hope appears. One can finally focus on trying to make their life better (possibly), but at the very least s/he doesn't have to constantly worry about their chosen method causing issues. It leaves the mind open to do other things. Am I making sense?
At least for me, my anxiety about the "how" is gone. I no longer worry about the when. I'll do it when I'm ready. Could be a week or years from now, or maybe never. It also helps that I now have people I can talk to openly about all of this. It's been such an unbearably sad & anxious secret having to censor myself all my life about how I truly feel because the topic is too taboo or scares people. So, all of those things have affected my overall mental status.