Why is Dalaran a no flight zone?

In the city, we want you to feel grounded.

Q u o t e:
Gives it a more 'bustling city' feel to it

And instead of creating a city as large and spread out as Shattrath, Dalaran is smaller and using a ground mount still gets you around quite quickly.

Q u o t e:
Indeed. A floating city ....where you cannot float...seems contradictory :)

So every class gets levitate then right right??