Console and mobile platforms forbid modding due to the companies that own the platforms. There is no choice but to follow the policies of companies such as Sony, Microsoft and Apple. It is out of anyone's control. Modding is only allowed on PC because Re Logic has full control of the platform on PC and they want to permit it on PC. If the policies of the other console/mobile companies were different it would be one thing and mods on other platforms could be considered. Right now however, we must also uphold the policies that console and mobile manufacturers implement.
Certain large companies like Mojang and Bethesda have used the leverage they have to be granted a rare permission to allow mods on their platform, but ReLogic does not have the power to do this.