The reality is ...
The reality is that vendors don't give a fetid dingo's kidneys (to quote Douglas Adams) as long as the crap sells. With negligible exceptions IoT is the biggest con since the South Sea Bubble. Using complicated overkill tech to do simple things like switching on a light or unlocking a door has only one purpose - to sell the complicated overkill tech (and preferably to monetise a data stream from it). But apparently you can fool most of the people most of the time.