This is true. I had a friend who struggled with depression for years, her grandfather, who she was very close with, passed away and it completely destroyed her. She hung herself a few days after. A lot of people battle with ideation and depression, but hold on for various reasons, even if it's hard for them to admit it. Once you strip away that last bit of hope, it can completely break you.
Even if you're not suicidal, there's an incredible amount of support to be found here. You can vent about your problems, issues, or whatever and you'll get tons of advice as well as a great sense of understanding that you can't find anywhere else. Some come here for the methods, while others just don't want to feel alone. I know plenty of people who've made real, genuine friendships from this place. I would never judge anyone for being on here for a prolonged amount of time.