Most fridges are repairable modulo buying one with a complex motherboard. Even then they're still fixable just spendy to do so. Also most aren't complex enough that you couldn't just reverse engineer the Mobo easily. People do this for cars and computers.
They could be much cheaper to repair if they used standard parts so repair places didn't have to order in custom pieces that they only use about 1 per year because every fridge has it's own version.