1) I don't necessarily believe you.
2) Public policy isn't based on exceptional cases. And girls beginning their periods that early are exceptions.
3) Unless they were providing tampons to your friends that is proof they weren't essential.
Any girls that is starting menstruation at eight years old has more pressing concerns than whether her school provides tampons. Like any unusual condition she would need to work with the school staff to accommodate her condition. But...
The bottom line is, these cases don't prove that the school must provide tampons.
I could respect a difference of opinion on this matter. I can understand that you may not see this as something a school
has to provide. (My own opinion is they shouldn't
have to, but it seems like the moral thing to do, and what they
oughta do, and leave legislation out of it).
I can't, however, respect the "I don't necessarily believe you". In 4th grade, I was 10, 5th grade, 11. Its not unheard of for girls of those ages to have periods. If you find me to be the type of person to come online to make up stories for the sake of arguing with people, I see there to be no point in us interacting. Take care, man.