Sometimes that is true. Especially with younger people, I think they can get impulsive and problems seem a lot more permanent than they really are. Of course, it can happen with anybody at any age, but I do think sometimes things just seem like they will last forever when they won't. And I think it's really sad when someone chooses suicide in that case, because it's like they never even had a chance.
But in other cases that's not true at all. Some problems are permanent, and they're never going to go away and they're never going to get better. There are chronic illnesses, terminal conditions, situations just never will be able to be made better, and not only that, will get worse with time.
I don't think that statement is true at all in my case. My problems are very permanent, and their effect on my quality of life makes death the better option to me. Time doesn't undo amputation, mutilation, and I'll never forget the trauma. I live under the threat of a cancer recurrence, and the life I used to have is gone forever. People tell me I just have to make a new, better life, and accept my "new normal," but that isn't what I want.