Here's why:
* The Wizarding World: The Harry Potter universe is heavily steeped in magic and its traditions. Many of these traditions are intertwined with education, with schools like Hogwarts playing a central role in teaching young witches and wizards about their abilities.
* A Nod to the Lore: By including a long list of seemingly random schools, the filmmakers acknowledge the vastness and depth of the wizarding world. It implies there are many magical academies and learning institutions beyond Hogwarts, adding to the lore and sense of a fully realized world.
* A Bit of Fun: The list of schools is also a bit of a humorous touch. It plays on the typical format of credits where schools are listed for actors' education, but with a whimsical twist for the wizarding world.
The inclusion of these schools isn't meant to be taken literally. It's more of a fun detail that adds to the overall immersion and enjoyment of the film for fans familiar with the books.