As someone who's friends with executive assistants: rich people use executive assistants (humans) because they are busy and/or value their time more than money and don't want to bother with the details. None of them are using voice assistants.
> Tony Stark certainly doesn't care. Elon Musk certainly uses voice to talk to his management team to book his flights.
Delegating to a human isn't the same as using a voice assistant, this should be obvious, unless you believe that managers are doing all the real work and every IC is a brainless minion. Maybe far in the future when there's AGI, but certainly not today.
> The average person doesn't have the privilege of using voice because it doesn't have enough fuck-you-money to not care for prices.
You can order crap off Amazon for the same price as you would through the website with your Alexa right now, but Amazon themselves have admitted approximately 0% of people actually do this which is why the entire division ended up a minor disaster. It's just a shitty interface in the same way that booking a flight through voice is a shitty interface.