Wow strong opinions or what?
Taking a 12 y.o out of school once probably not a problem repeating it yea a problem. Make sure that there are no tests etc that you’d expect them to do and that they catch up on the work without addinng load to the teacher’s (3 pupils can add a massive load if work is to be caught up).
Obviously in exam years taking kids out of class is irresponsible.
Authorized v’s unauthorized just means that the school is not condoning the absence but makes no real difference. To slate all teachers for what is standard operating procedures is infantile.