It'd be amazing if there were an open smart device protocol (maybe there is one?) that was widely implemented. There's no reason turning on the lights in your room or changing what Spotify is playing on your speakers needs to be tied to your Amazon/Google/whatever account.
That seems like a deliberately obtuse response. It could just as easily be a family member, roommate, or some neighbor that offered to help you set your Alexa up. The fact that it can happen at all is the issue.
Also, just another reason I don't use smart devices.