It's a source of malware and viruses. It prevents the ability to unsubscribe in one place. It allows apps to use private APIs which Apple can't prevent (i.e. Obj-C dynamic dispatch) thus opening up all sorts of attack vectors e.g. "phone" apps that record conversations etc.
And I assure you that it wouldn't be a tiny percentage of users if companies like Facebook would use it to do a run-around Apple's privacy controls. Sideloading could unlock tens of billions in lost advertising revenue to many companies.
It's a source of malware and viruses. It prevents the ability to unsubscribe in one place. It allows apps to use private APIs which Apple can't prevent (i.e. Obj-C dynamic dispatch) thus opening up all sorts of attack vectors e.g. "phone" apps that record conversations etc.
And I assure you that it wouldn't be a tiny percentage of users if companies like Facebook would use it to do a run-around Apple's privacy controls. Sideloading could unlock tens of billions in lost advertising revenue to many companies.