I agree with Irish Seaplane on this. Though, some people have the money, and want a toy. That's great, as long as they treat it as a life or death toy, and fly it seriously.
Water flying has many differences to land flying, with a major one being apparent freedom from the norms of an airport. Indeed, low flying with turns may be required to locate a suitable landing spot. But that freedom (from the airport manager watching what you're doing), does not chance the laws of physics and flight - botching it up is still possible, and much more likely fatal (add drowning and remoteness to the risks not present at most airports).
This event is extra sad, in that it was probably not the airplane's failing, but now a reasonable (albeit, somewhat "toy") program is less certain.