The obejective is noble but can you provide any realistic data or estimates of how this infrastructure can scale to more than a few million users and _still_ be high bandwith. Beyond that your bandwith will go down as you add more users.
The only use-cases that this serves are high-income people that want to go off-grid but are unwilling to sacrifice high-bandwith, and military deployments (which SpaceX does not hide as an objective).