Because most of the people click “i agree” without even reading! So apps will ask you to do these steps to install their app and most of the users will do that without thinking or reading!I honestly don’t understand the problem. Why not simply allow sideloading apps if enabled in System settings buried under several popups and warnings about possible consequences when enabling that option? Most people would probably leave the sideloading option disabled and the other ones probably know what they are doing and accept possible consequences or privacy violations.
Then when problems will start guess who they are going to blame … not XXXCasino for sure!