I agree that it minimizes moving parts. HOWEVER. Takeoff and landing on water is more difficult than land, because the water actually sucks the hull downwards,

I agree that it minimizes moving parts. HOWEVER. Takeoff and landing on water is more difficult than land, because the water actually sucks the hull downwards, thus takeoff is more challenging than with wheels. Wheels would add some manufacturing complexity, but inexpensive and lightweight landing gear is a solved problem for ultra-light aircraft. I'd certainly like to hear their rationale for this. If they are real, I'd guess that they are going after a market--such as people who own cottages--where access to water is plentiful but access to prepared runways surfaces is not.