DD does not ask to go all the time,doesnt get bad grades (her school reports are always very good& last parents evening we had,teacher praised her for always being very enthusiastic,a team player& a good role model for others)she rarely has time off& is certainly not a time waster!
No one has directly said she is. What has been said is that because of those issues, rules may well have to be applied and they have to be applied fairly, as in, to everyone. Your DDs teacher did use their discretion and let your DD go to the toilet once they had ascertained she was genuine. I don't see the problem?
What I do see as the problem is your DD was poorly and you and she were afraid she would have an accident if she went in. As she was poorly anyway, you kept her off, which is wise because if she was poorly enough to have accidents, best not to go in.
If she had gone in, a simple chat to the teacher (or if Secondary, a note in the planner) and they would know to allow her to go if need be, knowing the situation. Teachers are not mind readers.
I don't understand the hyperbole generated.