Is "socialization" important?

When I was in school, I was continually teased and bullied. I developed very poor self esteem. For many years, I thought there was something wrong with me.

The psychiatrist who examined my grandson said he needed to be with boys his own age, partly because his answers were “too mature for his age”.

He is now enrolled in a computer coding class with other boys his age. When I asked him if he interacts with them, he said no. I then told him the doctor says he needs to. He asked WHY?
So now I ask you, WHY. He is a satisfied “loner”.