If your future-predicting abilities are as good as your understanding of basic physics, I'm almost certain it will eventually be built. If the Wrights had listened to people like you we'd still be taking a 4 day train trip to cross the country, instead of a 4 hour flight.
I love aircraft...If the Wrights didn't do it I would have. I have been involved with aerodynamics and Space for a long time before working on computers, working with airlines and NASA at Wallops Island (Eastern Shore, VA)Conestoga project.
I do not claim to have future predicting capabilities...
However I am certain that this idea will not work. better to build a halfway station and build out that way, no tethering to the earth... that would be catastrophical...
Why haven't we fired a cable to earth from the shuttle to see if it can be done... I mean it's orbit is certainly closer to earth to test, it's mass is big enough to similate a counterweight...
I am not telling anyone to not believe, I am saying look at reality...