The send-to-the-cloud thing just exists because tech companies have a pathological fetish for recording, analyzing, and storing every single little thing you say and do and then trying to sell it to advertisers. Or train AI’s with it these days, or whatever the fuck else. The only marginal benefit you might get is that they can update their algorithms server side and not have to update your car or other device. But the technology has been mature for literal decades, so I don’t think that’s terribly important.
That said, I still don’t want my car to have voice control. It’s just as stupid as a concept as making everything touchscreen.