Nothing inherently unsafe with that design, active and neural at the ends with earth in the middle.
The issue is that all the earthed high wattage appliances like kettles, toaster, heaters etc have this German/French style plug :-
They don't really fit in the standard outlet here, but I've noticed a few examples where they have been forced in (such as the towel rack in the bathroom here) and when that happens the appliance isn't earthed which can be really dangerous.
Here you are supposed to use an adaptor that looks like this :-
Or use one of these triple adapters