If you’ve never been clinically depressed and suicidal I can understand how you feel that way. But depression is treatable, and suicidal thoughts are generally not rational nor “typical,” even for the person experiencing them. But they feel like ground truth at the moment. But with help that moment passes.

There are some that it never does, and I can see an argument there’s no point in letting them suffer forever. There are some that have rationally decided to end their life and they’re not feeling suicidal per se but are making a choice.

But the VAST majority of the time the suicidal intention passes, and their future self likely is glad if they got help.

Source: I’ve been depressed and suicidal. I am not now and I love life. But I remember clearly how differently I thought at that time.