I would recommend putting the BBB directly on the Ethernet network,
Then connect to it via Ethernet.
The USB-Bridge is useful only in certain simple connection configurations.
--- Graham
Some people, specifically that are college students may not have the luxury of using ethernet. In the case where they have a laptop, with ethernet plugged into the schools network. Or even if they're using wifi, using an additional cable may not be convenient, or otherwise very difficult if they're using that ethernet adapter at home on a dedicated network.