Seriously... well, I don't know anything about the online courses. And while networking is important - you only get as far in life as your friends help you get - if that's your reason to go to any college, you have the wrong attitude.
But the main thing is that Berklee is an excellent music college, and what you get there is different from a traditional music program (I went there way before they bought Boston Conservatory). It's an immersive experience.
And when I was there, the academic classes were excellent. The only difference was that there weren't very many of them to choose from, compared to a regular college or university. But a lot of what I learned, especially in the poli sci classes, sticks with me every day.