Believe it or not,, but it's supposed to be a joke. She only cares about Gohan's education and barely notices Goku's injuries.
It was supposed to elevate the tension of this saga, but It really doesn't work and all it did was ruin Chi-Chi's character.
Thankfully, Toriyama eventually realized this and dropped it afterwards. She's way more loving towards Goku in the Android and Cell Sagas to the point where
she becomes inconsolable after learning Goku died fighting cell.