My question Why is it acceptable to resign? was closed as a duplicate of an earlier question I asked, Is it poor sportsmanship to resign immediately after a major blunder early in the game? These are not duplicates. The older question asks "Is resigning (in a particular situation) proper chess etiquette?" The new one is getting to a deeper question: "Why does chess have a different viewpoint than most other games/sports about what behavior is considered good sportsmanship?"
Thus I seek an explanation for why the newer question deserves to be closed.
NB: Perhaps the correct answer for this newer question is beyond memory and has just become part of chess culture. If so, I think someone should be given the opportunity to say that.