I have a bunch of smart bulbs and switches. When I watch a movie, I want complete darkness. My TV is located in a place where light from 7 different rooms/areas can interfere. I would have to make sure I manually turn all of them off. Now I simply tell Google Home to turn them off. This is an almost daily use case.
An even simpler one: Having certain lights come on at sunset and turn off around midnight (assuming I don't manually turn them off). When you live in the north, the sun sets early, and it sucks to come home to complete darkness. Ensuring a few key lights are on when you come home makes a significant difference.
Oh, and I like 2700K, and my wife likes 5000K. We can both have what we want. Marriage saved.