Well, there is a certain enjoyment that comes from living – doing the things one enjoys. I don't know how one could argue that enjoying life is futile. If one is currently unable to do the things they enjoy, he/she should figure out how to fix it (see the general plan in previous comment). If one does not enjoy anything, he/she should try new things to discover what he/she enjoys. Not wanting to do such a discovery may be a sign of poor environment / life situation, medical conditions (depression), or general laziness. Each of these is generally solvable. A person who is truly determined to improve his/her life usually succeeds at the task, sooner or later. The key is to take the matter in their own hands rather than expect life to get better by itself. If anything I'd say ding so is a prerequisite of adulthood.