Also, maybe I'm the outlier here your proposed situation is particularly accurate (and funny) to me- a couple of years ago a dog chewed up our TV remote and I have still yet to replace it. I get up and physically go to the TV to turn the volume up or down or to turn it on/off.
I'm really not trying to sound like a luddite, I just really don't care enough to adopt this stuff, at least not for the foreseeable future...I don't see the purpose of life as an endless march towards total comfort and ease, though. I will concede that these devices and smart home technology makes life much easier for those with disabilities, and I ultimately support it's development for this reason alone.
But on the flip side, it's a poor assumption that if someone is not turning off the lights manually, that the primary goal is comfort or ease. I used to think manually doing all chores was a virtue in itself - I had a dishwasher in my apartment for years before I started using it. I no longer think that way. Now for me, if I can eliminate mundane stuff like dishes, lights, etc - it is because I want to spend the time on more quality stuff.
As an example, too many older people say they wish they had just paid the money to repair stuff in the house, rather than spending the time to repair it themselves. They took pride in their work, on top of also saving money. But later in life, they wished they had used that time better.
Compare this to: "What's the point of remotes? If I want to change the station, I get up and walk to the TV". Once you get used to being able to turn lights off by voice, you get lazy and happy.
And it's not just one light, BTW. Suppose when I go to sleep, I want all lights except the porch lights off. I don't have to walk around the whole house[1] switching them off, when instead I can just say "Sleep mode lights" or something equivalent.
[1] You know, the 3000 sq ft houses people outside of SV have.