The inability to be present has more to do with this artificially complex modern life we've engineered ourselves into, more than the trappings of our intellect.

Life was far more assuring, rewarding, bountiful, and meaningful if you were living in a small Native American community in the year 1400 and millions of bison roamed the plains, and the soil was the most fertile in the world, and you had a direct, non-abstracted, immediate relationship with every person in the community around you. All of your inputs lead to physically direct outputs.

And all of your biological wetware and quirks were designed and evolved to operate in this context. Hunting, foraging, moving your own body around, sleeping and waking with the sun, having non-digital relationships, eating whole foods from the earth.

And it's not to say life never had its struggles. But it was certainly more biologically consistent and natural than what we've turned it into.