Lol, you all have the arguments of the perfect egoist: sadness, suffering, "I didn't choose to live"… but seriously, what do you actually know about suffering?
I work in a hospital, and I see real suffering every single day. People living in miserable conditions, people with truly awful life stories. Imagine this: after more than 50 years of work, a stroke costs you your job, leaves you disabled, the state refuses to provide financial support, you have no children, and you are completely alone. Of course that person develops suicidal thoughts and depression, yet nobody really cares because the healthcare system is already overwhelmed.
What have most of us actually lived through at 20 or 30 years old that pushes us to reject and permanently destroy our own bodies? I'm talking about suicide. You talk about suicide, but in the majority of cases, I'm convinced you will never actually do it.
My point is that for some people, sadness becomes a drug. It temporarily allows them to comfort themselves, to escape the world and their responsibilities. You tell yourself that nothing matters anymore, that you're going to disappear, but it's a trap.
I've seen many specialists in my life who gave me different diagnoses: depression, bipolar disorder, and so on. It's comforting to tell yourself you're ill, because it removes responsibility. You would never tell someone with cancer that they are responsible for their cancer.
But despite that, I know I'm not sick, and I believe that's also true for the vast majority of people on this forum.
Hate me, despise me, me—the person going against your ideas and your adolescent clichés. But when you say, "it's my life, it's my choice," you are being deeply selfish, because you only think about your perceived suffering before considering the suffering of others.