I agree with the overall sentiment, but a smart switch would be harder to change than a smart bulb most of the time. Smart switch would require electrical work to replace. A smart bulb can just be swapped. If anything the toilet is a good proxy. A smart flush means it won’t manually flush. If they had done a smart fill you could just manually fill the tank with water.

Along with making it backwards compatible. (Ie, control system goes down you can still operate just like a dumb system)