system
Given the following post, respond as if you're commenting on Reddit:
human
[DCEU] Why didn’t more Kryptonians go to Earth?

Jor-El knows before he sends Kal to Earth that its yellow sun will give Kal godlike powers. If he knows this, presumably the rest of Krypton knows about the effects of a yellow sun on their species too (I know Jor was a scientist, but he was setting up Kal’s departure in secret, so he shouldn’t have had any revolutionary knowledge for the species). So why didn’t any other Kryptonians go to Earth or another yellow star system, instead of all dying on their homeworld?
gpt
Depends on who you ask.

One story might say that the Kryptonians were bonded to their planet - they literally *couldn't* leave, a problem only solved in the DNA of The Last Son of Krypton before he was sent to safety by his father.

Another story might simply paint them as xenophobic and insular, proud and cut off from the outside universe. They had the technology for space flight, but no actual ships, because why would they need such things in paradise? A yellow sun might make them individually powerful, but what is such power against the advanced elegance of their science and culture?

Yet another might see them try to escape, only to be foiled by the machinations of the brilliant AI - Brainiac - whom they trusted implicitly even as he conspired against their species' survival.

Many stories for many times from many sources, and perhaps only fragments of truth among them. One thread is common, though: most didn't try to live because they didn't believe they were going to die. Jor-El knew, by virtue of being smart or humble or curious enough to see the problem for what it was, but everyone else rejected his findings as alarmism and conspiracy. By the time he was proven right, it was too late for any of them and it was a small miracle that he managed to save the one person he did.