the thing is, almost by definition, to be selfish, is to do something that suits yourself but without any proper thought or care for other people.
suicide is an act done by one person, who has not truly considered and thought through the effect it will have on their family and friends - they have decided to do something destructive and they followed it through.
they may have thought about the effects, but it is a skewed conclusion they come to, which is what i mean by 'proper' - which is a symtom of the illness
the fact that the depressive person does not consider it selfish, and cannot comprehend the pain it will cause, is in itself, selfish ...
that said, i dont think a depressed person can be really called selfish in the usual sense of the word, or be blamed for being selfish in this circumstance - thats what depression does to people - it makes them insular, they retreat inside thmselves, find it hard to relate, hard to think logically and about things from other points of view, become self absorbed - they only see their own side - but that is not their fault, they are ill.
so i understand why people view it as selfish - it kind of is - but not in the negative way selfishness is often perceived. it is not the same kind of general day to day selfishness that most people experience.