Her religion requires her not to expose her face to strangers. Florida requires full-face shots for drivers licences. But it also guarantees religious freedom. Lifting Veil for Photo ID Goes Too Far.
Like the pledge in schools, this is yet another instance of the struggle set off by public property. In the case of the pledge, the state owns the schools and by predatory pricing makes it very difficult to compete. People who are not rich can't opt out, and thus they try to have their ideas of what should be taught in school implemented. There can be only one policy, but there are many contradictory ideas, so it is a fight. If the pro-pledge people win, the anti-pledge people lose, and vice versa. Both sides cannot have the imprimateur of the state upon their preferred outcome, because the state is singular.
Similarly, the state runs a monopoly road system, using predatory pricing (and coercive funding) to prevent anyone from competing. So access to the government roads becomes something everyone must have. And so competing interests must fight to set policy.
These two cases are both small things. Principle is involved, so they are well worth fighting over. But the actual effect of the decisions, whichever way they go, is small to nonexistent. Some people seem to think this is a reason not to fight. I disagree totally. If you won't fight for principle, what will you fight for? If you shouldn't fight for principle, what should you fight for?
But there are many cases where the stakes are not as small. For instance, can they teach evolution in the public schools? Or even larger: can they teach science? The problems are an inevitable result of public property. The solution is private property. Once you see that for the schools (where it is obvious to anyone who understands economics), then you are set to start questioning where else the same solution can be applied.
I apply it everywhere.