I understand that modern technology cannot be used in Hogwarts. The magic interferes with such muggle devices. But why can't they use a Biro?

I weep for the left-handed witches and wizards who have to use those feather quills and ink pots to write, and it all seems so unnecessary. A Biro is not like a TV or a toaster. It is a simple device utilizing gravity fed ink to coat a ball bearing with a thin coat of ink, allowing for easy writing. I see no reason why it wouldn't work in Hogwarts, so why do they insist on using feather quills?