Those products will earn profits to the producers after sale by bundling ads onto the app. Since the cost of producing the networking is less than projected sales, every unit will sooner or later have said networking and app. The app-only dishwashers will then out compete other dishwashers, slowly replacing all alternatives to app-only dishwashers outside "industry dishwashers" which will be app-free but cost 10x that of a dishwasher sold to the private consumer.

Try buy a TV without smart features. You can, but then you got to buy one intended for hotels and pay the market price for products intended for that market.