Obviously, the remedy for isolation was the key to the survival of a species.  A PBS show about early humanity explains how the aborigines survived, by the ability to trade in networks, bringing the story across with the endangered platypus, cut off from its own by a series of weirs altering a river.

I wonder sometimes, the isolation of the restaurant worker's life, odd hours, strange work, a different kind of an intellectual professional life.

Is it further isolating to pick up The Bhagavad Gita and try to learn something, or to ponder the possible realities of deeper levels of sub-conscious?

The conscious parts of a person, by which I mean the tools of the surface dealings of the kind that figure out the day, can be tiresome to deal with.  Until, through meditation, you grow aware of the deep.