Think of the 'hand stuff' as a wah wah pedal (and you can do more with a wah wah than just rock it back and forward). You also get a 'vibrato' like sound with it.

And I don't much like rack harmonica either. I'm surprised at people enjoying Dylan's playing so much, I though that the intro to 'Lily, Rosemary and the Jack of Hearts' was a bad joke, as much as I love the song and the singer. I'm looking forward to hearing some of the players mentioned though. But I repeat, Duster Bennett could play excellent stuff with or without a rack.