The point was that it was not reasonable for the school to go beyond letting her use an ID badge (which based on prior reports was the previous means of tracking students). The purpose of the RFID system was to improve their student tracking, which would improve the school's funding situation.

And why should they have offered her an exception? Giving in to silly demands like this girl's (refusing the badge, not the RFID tracker) would subject the school to infinitely more silly demands, all couched in "religious beliefs."