Don't get it (was it a joke?)
Answering your question: To become a better computer scientist.
Even if it is a side-effect, who cares?
better computer scientist needs interaction with other people, needs to learn to respect their views or at least understand them, evaluate. perhaps needs to meet other scientists. to exchange ideas and approaches. this is what schools and academia is for.
this whole self-taught thing is a time-bomb. we already have too many self-taught engineers, architects and what-nots who can only work with themselves, listen to themselves, and agree to their own designs. not okay.
being good at anything more often than not means also being good in working with people.
even though you can also call yourself better piper or better kiter, doesn't mean you actually are better at anything just like this.
Social skills are very important, cannot be more important in these times. 15+ years in academia, not as researcher, but as teacher, showed one thing - the best learners are those who are best at listening, at interacting with others, not the top-bookshelf-worms. Usually not the top kids, but most usually become top contributors to teams and companies at later point.
Surely now and then an Einstein is born, but we also know of people who were very active in their social interaction without all the academia fuss about it. and academia is one place to find people to interact with. and academia is not only Oxford and MIT where entry level is very hard, nearly impossible.
So all of this is not about academia, rather about being human with humans.