For most of us, there was no particular reason for us being born…....and think about it, if there was, if we were born for a specific purpose, wouldn’t that seem a bit limiting?
I do think you need to set yourself goals and objectives, as Michelangelo said:“The greater danger for most of us lies not in setting our aim too high and falling short; but in setting our aim too low, and achieving our mark.”
I suppose considering the human need for patterns and routine, a consistent reason or objective helps a lot of people feel a sense of purpose and keeps them going.
In the end, all we know is that we are – why we are is still very much open to debate.
Cogito ergo sum
[edit]: Alternatively, this may be how you see things