Let me transpose your sentence back to 1980:
"The amount of people that will run their own computers is negligible at the scale of the society"
(I was 8 in 1980. People literally said this.)
All someone needs to do is to productize a whole-house LLM that does voice to text, runs the LLM, does text back to voice (possibly mimicking whatever voice you want), and you'd have an Alexa replacement that is far smarter. I'd buy it in a heartbeat just so that I wouldn't have to do maintenance on it.