I'm sympathetic to that, but convenience/usability plays a major role as well for me. I would have liked to prevent my TV from having internet access, but its built-in apps are the only way to play 24p video without judder, so I caved. I would prefer to keep the streamer on the guest network, but the Spotify/BluOS app on my phone (with stickers covering the front cameras) can't find it then, same for the Chromecast Audio. It's nice that both the Echo Dot and TP-Link smart plugs work fine on the guest network without access to other devices on the same network, just internet. Adds some latency, but if someone hacks those devices, they still aren't "inside" my network so long as the router security holds up. Yes, a device that understands me without sending my voice recordings to the cloud would be preferable. It's inconsistent to give Amazon lots of training data in the form of voice samples while deliberately only saying "Hello" when an unknown number calls, I know.
Taking these things hyper seriously is about as fun as being vegan. "Hello, could you kindly tell me if the glue on the beer bottle's label contains any lactose, by chance?"
We should all watch the Battlestar Galactica remake and start identifying the Cylons of our time.
Though I will maintain that infrared remotes are not that.