No task exists in a vacuum; optics are part of the job. Nobody can be forced to employ him in the position that he prefers. If he feels strongly about it, he can establish his own transportation company called Lolita's Bus Line and attempt to win the school district's contract on his own merit.
P.S. Moderating your own self-expression to accommodate the comfort level of a diverse audience is a healthy, mature part of human social interaction. You aren't obligated to do so, but you must expect friction and obstacles when you don't. There are times and places to let your true colors fly. It's wise to recognize that and seek out those settings.