system
Given the following post, respond as if you're commenting on Reddit:
human
[DC Comics/Superman] Why does Superman look like a normal human?

Ive always been curious, Krypton seems to be a planet with wildly varying life forms and a biosphere that seems tremendously different to earth but Kryptonians themselves seem to look almost physically identical to normal humans. This despite the vast difference in in physical properties between earth and Krypton.

He seems to have similar sensory organs to humans, although in his case they seem to be dialed up to 11. He appears to have a humanoid complexion, skin, teeth and hair and appears to even be a distinctly Caucasian human. He has "normally" proportioned features and limbs. He even appears, by human standards, to be incredibly attractive. He seems to have a normal humanoid sex drive and must at least be partially biologically compatible with humans in some way in order to engage in... private time with Lois. By all accounts his emotions and psychology even seems compatible with human understanding and rationalization, he feels joy, anger, sadness and curiosity in ways that are incredibly similar to humans if not completely identical.

This despite the fact that his abilities, however it is they actually work, seem to function completely in defiance to his otherwise human physical appearance.

The variables that have conspired to make him look and act and to some degree "feel" human seem astronomical. How could creatures from planets completely unconnected by time and distance who seem to have never interacted before look to all appearances completely identical?
gpt
Jor-El picked a planet where the dominant life form looked similar enough to kryptonians that his son would fit in. It's a big galaxy, but enough worlds had evolution take similar routes with bipedal mammals that humanoid forms are relatively common.