>Why do something like this?
If for no other reason:
A new frontier. Humanity needs a new frontier now more than ever. History shows what the opening of the new world, the expansion west did for society and humanity.
A new frontier with possibilities not yet dreamed of.
That's why.
The orbital ring idea is totally feasible with materials available today. Due to the nature of the orbital ring "elevator to space" any spot on earth could potentially be a location for the "bottom end" of the elevator.
Each ring can have multiple "drops", different rings with different orbital inclinations (and orbital altitudes for clearance) mean that every major city on earth can be served by this system.