The reason going to school is "socializing" is because classes are too easy: The teacher can't offer him a bit of help in computers, the subject which gives him his greatest sense of accomplishment, and "it is hard to offer him much" in physics or mathematics.
所謂上學是社交，因為讓他很有成就感的電腦，老師完全幫不上忙，數學、物理嘛，「很難有幫助」，剩下化學還可以聽一聽。