For me, turning on lights etc are such a small part of my day, not to mention my 'needs' as to be completely insignificant.
If the machines would do something like sort, wash and fold the laundry that would be something, but as it is I people just buy them for novelty value.
And I am surprised how often I actually use little things like adjusting the lighting, finding my phone or keys, or even raising and lowering blinds.
Just yelling, "Alexa, turn off all the lights" as I walk out the door, or "Alexa, set the house temperature to 72" as I lay down for bed has really cut out a lot of fastidious things that by themselves doesn't matter much, but added up use a surprising amount of time.
Saying, "why would I want something to do x or y?" Sounds just like people I remember back in the 90s that said, why would I want email when I can just call? And then, why would I use text messaging when I can just email...
To each his own, I guess.