We did. It's worth noting that not all parents plan ahead for their child's first period at 9 years old, and I doubt I would have. My wife is more organised, a health professional, and of course a woman. I would never have identified some of the subtle signs that her first period was approaching.And I assume you provided her with what she needed. As should the parents of any such child. Which would make it essential for the parents to provide menstrual products, but not essential for the school. I had students that were diabetics, but the school didn't provide them with test strips and medicine.
At some schools I've worked at, we ran a breakfast club because it was important to ensure students had one nutritious meal per day. Because this directly impacts their ability to learn. At some we ensured deodorant was available for the boys after lunch (funded by teachers, not the school) because that impacted on everyone else's ability to learn(!)
If you spend much time in schools (and I am not judging your experience there, I have no clue) the contrast between what parents should do, and what parents do do can be vast. And what schools should do is try to setup safe and supportive learning environments, not because it's 'nice' but because it drives better learning outcomes.
Provision of medicines to students is not something a school can easily do, as there are privacy issues associated with it, as well as safety issues (ie. You can't allow self-administration by minors where there isn't a health professional).
Instead a good school would partner with a parent, get consent where required, store and provide access to medicines as required.
When I was a teacher I would regularly have an epi pen, an inhaler, etc with me when going on incursions and excursions. Each would have a consent to use it other plan filed at the office.
It's simply different to making a readily available product from the supermarket available for access and use by individuals.
Why would I? It's seems completely tangential. For what it's worth, Victorian policy on provision of tampons is limited to government schools, which are overwhelmingly co-ed in nature.Oh, and I noticed you haven't explained how it is essential for the all boys school to supply tampons.
I can think of one exception (Melbourne High) and would assume either there is a pad/tampon in the med kit for teacher/visitor emergencies, or they are simply exempted due to the lack of a female student body. Either way is fine with me.
I'm not sure why you'd leap to that as a 'Ha, gotta!' moment, to be honest. Seems simple enough.