What's my purpose?

One scarf.
Forty thousand scarves.
A million scarves.

Bee 1 gets a scarf in the winter to keep warm.
Bee 2 gets a scarf in the winter to keep warm.
Bee 3 gets a scarf in the winter to keep warm.

We could go on but the idea is clear.

We look after one bee and the other bee. But it doesn't matter. Ultimately the organism looks after itself. If Bee 1 is looked after but Bee 8357 is not looked after, Bee 1 is still just as expendable and replaceable as Bee 8357. It doesn't matter.

We look after me and we look after you, but ultimately we are only a cell in the organism. We serve for a little while and then we are shed and replaced. No matter how much care we take of the cell, the person, the bee, it will still die and be replaced.

So. A bee's purpose is to work for the colony. To ensure its survival and its reproduction to a new generation. So a cell's purpose is to convert glucose into energy to ensure the survival of the being and thus the cell's reproduction. My purpose? To work for the survival of the homo sapien species? To reproduce? It doesn't appear that I have much to offer towards the survival of the species. I have no offspring and I will continue to use resources until my time is up. What's my purpose?