Most of the time, I don't know if I should use the mother tongue so everyone can understand my points, including the layman. (wakimbia umande) Simultaneously, skeptically considering weather to ignore the unbelievable articulation of the English language. It's a fuking dilemma right there! But since the thread is in English, then allow me to utilize that unimaginable level of articulation effectively.
Initially, I thought you were talking about the rat race. But no, the argument sounds more philosophical.
Honestly, I think this is an interesting and intriguing topic. Especially when it comes from someone you don't even know enough to arrive at a critical and logical conclusion. Since this kind of thing is incredibly and highly subjective. Because, well, humans are absolute individualistic types of creatures. Maybe even the only creatures with such features on the planet. Thanks to intelligence and big brains comparatively to body proportionality.
Anyway. When you sit down and actually think about this argument, critically with enough logic and reasoning. You'll realize that. It's a choice! Not that they don't know what's happening. They do. "They" aren't stupid. It's the same choice as you thinking their lives are incomplete and purposeless. Outside of this argument, if you ever dare tell anyone that their lives are incomplete and purposeless. Do you know what would happen? Yes, they'll kick your ass right to mortuary. Because that is an insult.
The answer is... and yes, I'm not claiming this to be the right nor absolute answer. It's just another individualistic perspective that's maybe close to reality. ...Is that.
Besides surviving. Life in general has no purpose. There's no point, no point in living even existing. Nobody, not even you, know the exact, absolute, unbiased, sensible, mentally, and consciously calculatible answer to why we are here. It's a paradox. There's no way to escape. Well, unless you prefer the alternative of surving.
Besides, as the old saying goes, old as life itself, I'm sure, or maybe since consciousness came into existence. That life is a bitch. A dirt, cruel, unempathetic bitch.
So again, as I said earlier. It's a choice. Not a subliminal nor environmental conditioning.
You either "choose" to atlest survive with what you've got. Or go your own way, do your own thing, and face the harsh consequences of the cruel reality of life.
Adios!