I think this is 99% caused by advertising in itself. One of the oft-forgotten facts about ads is that they can not only influence you to choose between competitors for irrational reasons, but they can very often influence you into buying something that you didn't need at all. In fact, this is often the primary purpose, as Amazon for example profits more from you owning a Siri speaker than they do from you not owning a smart speaker at all (since part of their stock price will be influenced by the size of the overall smart speaker market, not just their slice of it).