That's true in this particular case. In Virginia, until recently, the school boards were appointed by the county Boards of Supervisors. So "voting them out" wasn't really an option.
Also, it was happenstance that the election was so soon after the school board announced their ID policy. What if the parents and teachers had to wait 3-4 years? That's the entire high school experience for some kids! Surely they should be able to get some relief in the meantime.
IMO, it would have been better to sue in state court for fraud, and also to have the school board impeached for high crimes and removed by the Penn. Legislature. If they had been removed by impeachment, they would never be allowed to hold any office in the future.
Who were voted in.