During the roll out phase, such as when appliances were a new thing and everyone wanted to buy one, companies could make super reliable appliances and they would still get recurring revenue because there was a ton of unmet demand.
Now everyone has a fridge, washing machine, etc. If they all lasted 30 years you would have a serious problem with keeping the supply chain alive. In the end what would probably happen is that the price would explode since now a new fridge would be more of a small run custom manufacturing job than a mass produced item.
Trouble there is that people won't pay $2000 for a fridge even if it is extremely well built and will last 30 years.
Play this out and you can see what happens. Enter the cheap competitors who make appliances that last 5 years... pretty soon the market looks exactly like it does today.
Large industrial supply chains aren't simple machines. You basically can't turn them off and then on again. A ton of the seemingly irrational nonsense in markets stems from the fact that everything has to find recurring revenue to stay "hot" or you just lose it entirely. We can't go back to the moon because we stopped going, so we lost the supply chain for the Saturn V.