You may be using a stricter definition of "control you" than GP was. Perhaps the better word would be "influencing" you. That can mean something as subtle as re

You may be using a stricter definition of "control you" than GP was. Perhaps the better word would be "influencing" you. That can mean something as subtle as reminding you that pizza exists and it's yummy and mmm isn't pizza just so yummy? Basically what commercials have been trying to do since forever. Even if you don't believe Alexa and Siri are recording everything you say, I think it's pretty clear that asking them to play music gives them some power to influence you. You're telling them your musical tastes, and you're (presumably) letting them pick some songs for you. (At the very least, by simply not having the song you asked for available.) One reason, perhaps even the biggest reason, that Amazon and Apple created those products is to sell you more shit, and both of these give them some power to influence your buying habits. Perhaps that power is tiny, and the tradeoff is worth it. They're also trying to influence who you buy from, or what services you subscribe to. Vendor lock-in and all that. Is that not them trying to influence you? Perhaps even to control you?