What makes you think mobile app and browser interactions couldn't be faked? Strong reliance on an app with many fingerprintable permissions or on unique device

What makes you think mobile app and browser interactions couldn't be faked? Strong reliance on an app with many fingerprintable permissions or on unique device and user identifiers slightly requires spammers/promoters/shills/bots to up their game, nothing more. This is and has been happening for years, both with advertisement and engagement metrics aw well as content, and for both commercial and political purposes.