>>418561 Because one of the points of Superman's character is that he might be a mighty alien, but he grew up as a Kansas farmer's kid and as Batman said once "he is more human than I ever could be". That was what the writers wanted to do with him. Take Martian Manhunter, with him, they emphasized how NOT human he is, that his guise is merely to make others not be afraid of him.
>>418583 I hate the shit in fiction where alien species are just "literally regular human looking people but come with natural super powers far beyond mere earthlings".
Star Trek is also an example of it, the random hodgepodge of abilities Vulcans possess are nonsensical, though they usually at least make the effort to glue some dumb shit to the actors forehead or cover them in bodypaint.
>>444886 Next Gen at least tried to explain that it was because their was a Precursor race that seeded all of the planets to essentially evolve life in a way to where their sentient species would look like them. But for the original series, it was 100% because they barely had a budget.
>>418561 Why do Daxamites and Kryptonians look exactly alike? And why do Daxamites get cucked by having their weakness be to something that is super common, and it doesn't just poison/depower them for a little while but takes away their superpowers permanently while giving them a terminal case of poisoning?
>>446133 there was an issue that explained it, but I forgot which one, some time in the late 2000s I think, probably around the time when Supermans creators were suing DC so DC quietly started removing Superman form everywhere and for a while you had Mon-El taking Supermans role. Basically, Krypton used to create intergalactic colonies, and Daxam was one of the worlds they colonized. Daxamites are therefore "genetic cousins" to kryptonians. I don't remember where the lead poisoning comes from though.
I think that one issue I mentioned also explains why earthlings are so much alike, but I forgot the details.