I found that it was pretty easy to replace the battery and screen of the last few cellphones I've owned. Ironically, it was much easier (and cheaper) to find the necessary parts to repair the apple ones than the cheapo android phones which often cost as much as the aftermarket parts.
If you consider the cost of specialized labour needed to diagnose the problem, then repairing quickly becomes unaffordable for a $300-$1000 purchase. This bill will not stop that.
Appliances are physically larger, and therefore are much more difficult to dispose of, ship, and get into place. So if you compare the cost of repair, to the shipping and disposal cost, they probably become equivalent. Goodluck getting a fridge out of your house without damaging the walls for cheap.