They can overcome the fear of death but can’t overcome other problems…
This is an incredibly insensitive thing to say and I really hope you're going to educate yourself on the topic before continuing to say something like this.
It's not random "other problems". It's not "Oh, I don't want to work the rest of my life." or "I don't get enough vacation." or whatever the hell you think it is.
It might be someone with a deadly cancer, who knows they're going to die a painful death within the next 6 months. It might be someone with excruciating chronic pain, knowing that they will NEVER get relieve from it as long as they live. It might be someone who fought in a war, who has seen hundreds of people die, who had to kill some of said people, who is haunted by memories awake and asleep and doesn't have any hope that the future is going to be bright ever again. It might be someone who was abused, bullied, never appreciated even once in their life, and who just can't deal with the emotional pain anymore. It might be someone who lost everything because of a war, or a natural catastrophe, or whatever reason, and doesn't see a reason to live anymore. It might he someone who's severely depressed and who's own mind is constantly fighting against them.
You know what all these people have in common? They don't know if it's ever going to get better. They don't know if their problem is ever going to be manageable, if there's ever going to be light in their lives again, if the reasons to live are ever going to outweigh the reasons to die. They lost hope, and they came to conclusion that the only peace they get will be in death.
Don't you dare undermine their experience. Nobody commits suicide, takes their entire life on a whim, because they had a bad day. There were months and months and possibly entire years of struggle and no hope. Suddenly, death doesn't looks scary anymore, but like the only thing that will stop the pain.
I should add: Seek help when you're struggling. There's phone numbers you can call, and organizations to turn to. This is the only life you have and a better day can always come.