In the Lennon/McCartny section the author talks a lot about an emotional connection and even throws the word magic around, but I think he is neglecting the fact

In the Lennon/McCartny section the author talks a lot about an emotional connection and even throws the word magic around, but I think he is neglecting the fact that Lennon and McCartny recognized each other's outstanding expertise and value to the band and to each other on a rational practical level. They impressed each other on a skill level.