It's always crazy to me to see this kind of smug takes defending huge corporations as if they're your friends.
It's not all good or bad, there's a security issue with side loading, as well as shovelware on the play store. However, there is no world where I would argue that these justify limiting consumer grade hardware to walled gardens.
It's less about defending and more about being annoyed with all the over-confident, uninformed opinions people frequently post in reaction to any news article on the subject.