Obviously there is something wrong with someones judgement when they think their life is so bad they have to kill themselves. Depression is a serious problem and sometimes people can't deal with it themselves. If depression/mental illnesses goes unchecked it can lead to suicides, or irrational behaviors. You don't know what kind of emotions a person who commits suicide is going through.
When you know someone that has completed manny exceptional things in their lives and you have seen them live happily and complete anything they put their head to commit suicide it doesn't seem to make sense especially when you have seen the person enjoy life at such a high level.
Suicide isn't right and the people who are in such deep depression need help. Suicide is not a cowardly act. Its a permanent end to a life and I am sure that the people who go through with the act are suffering greatly psychologically.
Take greater care in assessing your judgements.