Yeah using a USB stick is arguably not too difficult but still more difficult than state of the art OS upgrades are with the competitors. If there is no real technological hurdle to make the jump from Win to Linux require just a few clicks in a friendly GUI environment, why should we not pursue that?
Don’t know why exactly are you downvoted but this is exactly what is going on as cars get more ”connected”, following Tesla & BYD lead. Just like with phones at the moment, everything tries to spy on you a little to tap into that sweeet targeted ad revenue, or something else.
For example I bet the insurance companies love to have some driver behaviour data about you, and the big retail likes to know where/what time you are on the move (though they already get it from the dozens of apps on your phone that have access to location data, like Google Maps).