What's the point of the 'thopters'?
They've obviously mastered gravity or at least have some magical thrust system with all the other craft (including everything from skyscraper sized transports to the small spotter units for the spice harvesters - and the Baron, hells why isn't everyone using whatever he's using to float about?), so why are they using such a clumsy vulnerable craft for small transporters/fighters?
If it's because they look 'cool', it's an awful and insulting choice.