I hate when people say shit like that. Killing your self is not some easy thing you do on a whim.
It is broski. Its tragic as fuck and I'm not blaming him at all but it's not something you do for the benefit of others.
When it comes to depression you often think it is. Depression is not rational. You can have everything going for you and still think that the world is better off without you.
I can't speak for his mindset, but there are those who feel that if they kill themselves that those they love will be better off because they won't have to deal with the person who is depressed anymore.