I wouldn't go so far as to say that people who "lack the courage to end their lives" have a mental disorder, since theres a very big emphasis on context with that statement. Theres just far too many scenarios in the thing you call "life" to have a universal umbrella statement for all groups of people in that category. Just because you might see something a certain way, doesn't mean someone else will after all.
I am more so interested in your second statement, the distractions part. Its interesting because there have been lots of studies done on this that show depressed people, people that lack that "distraction" aspect, or those with mental disorders in general do tend to think more about the "external" aspects of life beyond the mundane everyday things a "normal" person would. They think about existence, philosophy, the meaning of it all, death, what is actual joy, and such things like that either because they are at a low enough point in life they can think about these things without some "life happiness" distraction shield, or maybe they lack the said things, the meaning of their life, thus they look at the concept to a much deeper level, and in that way, that does make them "better" or more realistic thinkers than the "normal" people.
I might have started rambling at the very end there, but it is a very interesting thought/concept to think about, because we really are different from the normal public, and not in just the fact that we are sad or miserable, but because we genuinely think differently than them. Now to them we are perceived as "pessimistic crazy suicidal nihilists" but I personally like to believe we see a much less biased lens to life, almost like certain aspects inside our brains are literally different to theirs.
