But if the student is not wearing school uniform, then...
Students should wear school uniform.
I agree with you that allowing students to wear whatever they want helps them in their creativity and teaches them how to make their own decisions. But doing learning journeys, whenever a student gets lost, what if a teacher that the student does not know happens to walk past him? And if the teacher also does not know the student is from the same school? If the student is wearing school uniform, then the teacher would know that he is a student and help to bring back to his class. But if the student is not wearing school uniform, then the teacher would not know he is a student. Bullying does happen in schools if the students wear school uniforms or not, but at least for schools with uniforms, the victims of bullying will not have to worry about the clothes they wear which is one less thing to worry about as long as they keep their uniforms neat.