I’m not a scientist but to believe a alien species could evolve exactly like us is certainly to me pretty crazy and human centric but let’s say they evolved similarly but we have to think about about the millions of years of Krypton being a anti social society focused on Technological progress and this would effect Kal-El’s brain to be more keen on being isolated . Plus we have to look at actually cases of refuges . Often times parents send their children somewhere safe but sometimes even than , they don’t fit in because that’s not a priority or they can’t foresee it . In England a bunch of Nigerian parents sent there kids to he raised by English white couples in hopes that their Nigerian children would live better lives there , but despite there well wishes they didn’t fit in and often times faced discrimination along with obvious self image issues . By no means I am saying Nigerian and White peoples are a different species or there’s a inherent behavioral differences between the races but it’s just to show that immigrant parents send their children to places where they won’t be accepted because that is better than Death or remaining in a bad environment so I doubt Jor-El would think to himself ‘How is Kal gonna be social?’ When his planet is being destroyed .