As much ridicule as this has gotten, if you step back and think without judgement for a second, you’ll see that this actually makes a lot of scents...
I have a dog and even though I don’t smell “eau de chien” in my house, my guests do. So, I run a diffuser to neutralize any dog smell. The problem is, it’s either on all the time, all day, even when I’m out, or I turn it off to save the essential oils but never remember to turn it on. Who wants to have to turn on a diffuser every time they get home in addition to all the other things you do when you arrive? And same for when you leave?
Home automation is about letting your home do all the little things of managing itself, without your direct intervention. It’s no more “lazy” than letting a machine wash your clothes or a robot vacuum doing an automated daily cleanup while you’re away.