"Do we want to return to the womb? Not at all.
No one really desires the impossible:
That is only the image out of our past
We practical people use when we cast
Our eyes on the future, to whom freedom is
The absence of all dualities.
Since there never can be much of that for us
In the universe of Copernicus,
Any heaven we think it decent to enter
Must be Ptolomaic with ourselves at the centre."
- W. H. Auden
And there, in a nutshell, is the rationale for Facebook.