By what? In the words of Inigo Montoya: "The way you use that word... I do not think it means what you think it means."
Sure, we're kinda-brute-forcing things now, but that's no physical law (nor dictionary definition) declaring that digital assistants will be just captive pen-pal lamp-genies of Big Companies inside their Big Computer Rooms forever.
Perhaps someday you'll be able to grab an off-the-shelf AI core, "flash" its mutable-circuits/firmware/weights with a starting state, and pop it into an appropriate chassis for the task.