It is linking two unrelated systems into one decision point. That is not good. There is no correlation between having headlights turn on at dusk and having them follow the path of driving when dark. One is convenience (lights turn on automatically), the other is safety (lights illuminate as much road as possible when driving).

Simply, the use case is flawed. Apparently, however, the people at BMW agreed with you. Perhaps, like iDrive's many versions, they'll figure out the problem and correct it.

Joel