The point being, every circuit board on every appliance is easily used at 100 to 200 volts IF the manufacturer decided to make it so. Toasting refrigerator circuit boards is mainly due to what is ordered by the factory. Most manufacturers state that the equipment is for Canada and the USA, another 7 volts and your warranty is void. It is a designed fault.
These days manufacturers cut corners wherever they can - even the good ones. Everything is made of cheap thin plastic that is lucky to last a year. I would say you get what you pay for but that wouldn't be true anymore either. We had an old time appliance guy fix our house fridge and he talked about what junk the new ones are - even the high priced big name ones all the rich folks want (not mentioning names). He said some need repairs in the first 6 months and then it takes him 6 months to get the parts because they are built somewhere in Europe. There are lots of things manufacturers could and probably should do but don't hold your breath. How could those big shots fly around in their jets if they had to put money into building stuff they sell?