In the great scheme of things, does it matter?
I went to school for a year in California, in 1975, what a joy, as a pupil, to be able wear my own choice of clothes, a joy for my mother no to have to purchase uniform, often from a designated store, often at great expense.
I’m far more concerned that both teachers and pupils are completely engaged in education!
Walk into any city in the UK and you’ll see much fewer “work uniforms” ie suits etc on show.
I know many people consider “uniforms” very important and dressing smartly, but frankly I’ve worked in very casual and very smartly dressed offices across my working life, I think the clothes worn for work should suit the situation and safety of the job, so yes, Armed Services, Builders, Fireman, police offices, Nurses, Doctors all wear clothes appropriate to their roles. Office staff? Work hard, do your job well, wear what you like within boundaries!