@Intrepid,
Why I think I had cover the WHY? my friend however the benefit is on the same order as a new born baby.
What benefit is it to a family or a tribe to welcome a new born?
In any case it is the beginning of the technology to be able to develop the resources of a whole solar system thousands of times greater then what we have on earth.
It will end up granting us one hell of a nice insurance policy
when not
if the earth turn once more highly unfriendly to human life at the same time.