Yeah but the death of Jor-El is such an abstract thing to him, and something he doesn't even remember. I think we still need to see him feel the loss of his adoptive father Jonathan as well-- someone he actually knew and loved, and who instilled the values that he carries forward as Superman.
I think that death carries a lot
more weight, and is a lot more important for the character's growth. It's a defining moment that I thought was kind of missing from L&C and TAS, where he still had this perfect, happy little family to go back to all the time.