A lot of things about how krypton was depicted (in the 70s & 80s most of all) never made any logical sense. Too often in the bronze age the writers & artists treated krypton as though it was no more advanced than 20th century earth.
I think I know what you mean, but this has more to do with the portrayal of what they share with us, their humanity. For all the advanced technology, they are as human as us, with myths, legends, superstitions, customs and cultures, and certainly all of our foibles.
...and having college (even though he was a documented Superman in college) roommates with substance abuse problems.
You're kidding. I'm glad I missed it.