Or an AI Jor El telling his son to be Earth's champion.
Without the fortress or AI Jor El Clark would've or maybe suited up later in life with that, he was already saving lives and fighting meteor freaks. He was barely at the Fortress most of the time and they kept postponing his training.
Since 78 Superman Smallville, Man Of Steel and now Superman & Lois have been dragging that AI Jor El/Fortress origin through the dirt, it's not interesting any more.