A good question, and I'll reply with what I think is a good answer.

The reason there is an advantage is the same reason we still have universities; and the advantage is the same that a private tutor has over a collegiate level course. Bear with me.

We have universities because there is a level of personality and interaction to the learning process. If I'm having trouble in a class at the Institute, I can ask the professor what I'm doing wrong.

The Internet has become okay-ish at crowdsourcing the answers to people's questions, via sites such as Stack Overflow, Yahoo Answers, ChaCha (for whom I am a Guide), et cetera. What the Internet still cannot do, however, is interact one-on-one with a student, tailoring the program to her own personal needs, answering her questions real-time and having enough data over time to pinpoint the areas of general misunderstanding, rather than handing her an answer for every specific question. Why have a student memorise the known MD5 hashes for an 8-bit integer, exempli gratia, when you can teach her the algorithm?

Some folks just don't learn as well from written tutorials. I am one, so I know they're out there. Thanks for your input