Most users are probably totally unaware of their smart appliances' capabilities or can't figure out the confusing UI. I know that I can't half the time.
This. My parents have several smart appliances but were completely unaware. Even if they were aware they wouldn't care. Regardless of one's opinion of the privacy aspect, none of the "smart" functionality their appliances have is worth the time it takes to set it up. It's mostly pointless.
And this is why smart users have to live with annoying nag messages and "lets set you up" guided dialogs