Because they're right. They'll all collude to make sure that you can't install a non-"smart" OS, just like you can't buy an non-"smart" tv, and the public will be well-trained to mumble something about the "market" and call you names ("luddite," "techie," "boomer," whatever...) when you complain about it.

Once a generation has been raised who never saw a computer that couldn't refuse to let you type what you wanted into it, young people will stop believing that you could ever type what you wanted. Old people will forget that you could ever type what you wanted. It worked with literally everything else.