I don't know about your personal situation, and it may be different for whatever you are suffering with, however the part you quoted is true for a lot of cases.

Having just looked after my wife through a period of ~3 years really severe depression I've seen it first hand, it completely changed her personality and outlook and she was saying all kinds of stuff she's quite embarrassed by now. She genuinely couldn't think straight at all or see any way out, and in that moment if offered the choice to die she might have taken it (a fact she is quite scared by now, having mostly recovered).

Similar story with my brother, who has bipolar... when he's manic he has an absolute inability to hold a train of thoughts together for longer than 30 seconds. When he's depressed it's absolutely awful. He's now stable and enjoying his life.

I'm not arguing that this shouldn't be an option for some very extreme chronic conditions, but it's obviously complicated.