It is the product of intelligent design — not in any metaphysical sense, but in the literal sense that an intelligent being designed it, with a specific purpose in mind, using accumulated knowledge about materials and their properties.

The fact that it was made from bone rather than metal, that it was designed to kill a mastodon rather than to fly through the air or transmit information electronically, does not make it less of an engineered object.

It makes it a differently engineered object, produced under different constraints, for different purposes.

The people who made it were engineers.

They were hunters.