Why does the Android download filter not allow the installation of unknown apps?

Why does the Android download filter not allow the installation of unknown apps?

Android, as one of the world’s most popular operating systems, powers billions of devices globally. Its open-source nature provides users with flexibility and control, allowing customization and access to a vast array of apps. However, this openness also presents challenges, especially regarding security. To counter risks, Android has implemented a download filter that prevents the…