Right. I also am a self taught programmer working in industry since straight after high school, although in my case it has been closer to 20 years.

This has never been a problem in terms of skills or employment and advancement. The only part I feel I missed out on is the networking aspect, and perhaps doing a minor subject, some language, literature or general studies unit or two would make one a more well-rounded person.

It's hard to justify the time and expense just for these benefits though.