Marginal costs
"Home appliance manufacturers will be adding connectivity to every device, no matter how mundane, because the price of adding it will be marginal."
Owing to there being an external cost on consumers, to pick up the pieces of lousy IoT implementation, governments have to get involved. Like racing drivers considering accidents, IoT manufacturers believe that it won't happen to them.
If the cost of adding IoT functionality to my hand held torch is marginal, I'm happy if the manufacturer keeps five pence after leaving it out.