We started because I wanted to dabble with smart lights and play with home geekery. We are also always playing music in the background, so she made that much simpler. Then as you add more lights, enjoy the music, you add more devices for more rooms. Then some Sonos. But I understand that if you buy an Echo Dot and it's just sitting there, not sounding very good on its own, doing very little.. I mean.. of course people get bored.
You can also turn off the 'By the way' options but you have to dig into the settings, and to be fair most people prefer to complain. I do hate you cannot turn off the suggestions that appear on a Show, and that I cannot directly write Python scripts to do what I want with it.
I find people do worry about the 'It's always listening to me' but when you try and explain how the hardware/cloud aspects work (I'm a security engineer) it's too much, and they fall back to worry/FUD. Just like most topics, people want a headline, not actual knowledge.