I think their point is the users would not get the choice to "want" to sideload. Fornite, Facebook, etc would pull themselves from the App Store and be sideload

I think their point is the users would not get the choice to "want" to sideload. Fornite, Facebook, etc would pull themselves from the App Store and be sideload-only. Forcing users to choose between the security of their device, or their favorite games and social media apps.