why indeed
>>but why?
...because 'can'. And will until something breaks.
As for the current crop of IoT, they're basically Christmas Cracker novelties: fridges, lights, front door locks, toilet flush, etc. I'm sticking with tradition. Tradition works - we're going back to vinyl, (and VHS tape now I read, but that was also crap, so I'll skip that one!).
I have just 6 Internet Things: a router, 2 phones and 3 laptops. And those alone cause enough problems.
The idea that a vital, fundamental home device such as a lock requires a live connection back to the manufacturer just to work, is insane.