Depends, I suppose. If you are just numbing your pain with substitutes, it is a more humane version of a suicide where you just leave the world though in a calm and non obtrusive way where you might be still walking and talking. Perfect for the individual, endgame for the species if popular enough. Just natural selection, if it works on only a small part of the population.
I think of history for men as being inherently lonely and that civilizations conquer each other partially because there are surplus men domestically as a result of polygamy. This is supported through relatively low variation in y chromosome DNA. Extra men are a problem but, as you say, people losing interest in future generations is also a problem.
