I have a feeling not many Swiss buy a satnav, go on a two week trip with it and then return just before the return policy ends.
So you don't see people to go Jumbo (home depot equivalent) buy a tool and return it a week later after the job is done to get a full refund.
In fact even digitec/galaxus will charge you a 10% restocking fee if you opened the item and it isn't not defective in anyway.