If we were created for a purpose by a sentient being, would that purpose make our lives more fulfilling? I suppose that would depend on the being and the purpose for which we were created.
When I was younger, I had a vague belief that God, the omnipotent, benevolent, disembodied being that existed everywhere but resided in some other dimension, had a Big Plan. God created humans and everything else as part of the Big Plan, and we all had a part to play. To fulfill our parts, all we had to do was to have faith that we were in the right place at the right time, and to go about our lives morally in ways that made us happy. And when we died, we'd be able to talk with other higher beings about what the Plan was and what we had done for it. In retrospect, even though these beliefs now seem absurd, the idea of working for someone infinitely wiser than I, to accomplish some infinitely great goal, would still make me feel better about my life. (It would make more sense if God was infinitely wise and good, but not omnipotent. Omnipotence is inherently contradictory, and an omnipotent being wouldn't need my help to accomplish any Plan, no matter how Big.)
Suppose I wasn't created by a higher being, but I was brought to life with a purpose. Suppose my parents chose to have me because they wanted someone to take care of them when they were older. Um, yeah. Sorry, I'm not interested in the hospitality/health care industry, so personally taking care of them is not a purpose that I'd be happy about. In fact, being brought to life to fulfill any specific goal of my parents - or any fellow human - that would seem rather presumptuous of them. For a person to think they could dictate someone else's life's purpose would require such arrogance that I would only expect it among fascists and egotists. I certainly wouldn't take satisfaction from knowing that someone else had a purpose for me.
I've addressed the extremes of the spectrum, but how about something in the middle. Suppose humanity had been created by a highly moral and intelligent race in order to accomplish... something. For me, it would seem utterly arrogant for a species to create another sentient species just to help it complete a task. I doubt the members of the created species would take much fulfillment from their designated task, and what happens once that task is completed? Furthermore, where to the creator species get their purpose? If they have no given purpose, then, ultimately, fulfilling the purpose they have us would also lack meaning in the larger context.
That's what it's all about - context. As far as we can tell, there was no sentient cause for the Big Bang. The universe is not here for a purpose. I'm here because of the universe, but there's no purpose behind my existence. What can my Earthly goals mean in the larger context of the purposeless universe? Can they matter? In the context of the universe, does anything matter? Next post: subjective purpose - whatever that is.