"When Doudou Wong from Shanghai was four, she began attending additional math, Chinese, and English classes outside of her weekday kindergarten"

I actually think that is an incorrect myth. You can have a social life, you just have to pick social activities that are compatible with the grueling schedule. For example, I took up social dancing, which meets with a regular weekly pattern, and I was able to plan my experiments around it.

If you expect to have nonscientist friends that want to impromptu go out all weekend every weekend, well, that's maybe not going to happen, but I think that a lot of scientists use the process as an excuse to justify their social anxiety - the causal arrow here is in the wrong direction.