Re: Why use this stuff?
The simple answer is something about the product appeals to the buyer. Some might understand and accept the privacy risks for peace of mind to watch property or check a babysitter, for example, isn't swinging their baby around like a flag. There are others who will just see it, not fully understand the possible privacy risks and think it's 'cool' or another vernacular. They just want one or were impressed when someone showed it to them / they saw a demo.
I don't need an Echo Dot. I wanted one so I got one. I'm aware that it's effectively a live mic 24/7 listening for an action word but it offers convenience on some things. I may not end up using it much at all so for me it's exploring the tech and lazily turning my light on and off right now. I delete the recordings and have to trust that they are purged when I do so. If not, well, Amazon and co are welcome to hear me demand my lights be turned on and off.