In all do respect,
Much of what is created in band in a box depends upon the experience the user has WITH BIAB, Not so much music.

it has little to do with musicianship, but more to do with picking out what styles and sounds you want to use.

The whole idea of band in a box was to give people canned arrangments of various styles, to either write over, sing over, or play over, it's best for a practice band mate. That's where it excels.

I agree it helps understanding music, but it plays what IT plays, not what YOU play.

A glorified casio keyboard of days gone bye.

Lyric writers or people with minimal playing chops, it will seem like a dream come true, but for a musician it will frustrate you if you think you can make good demos with it