Paul McCartney took nearly ten years to perform a Beatles song on tour again after facing the challenge of revisiting the magic he made with his ex-bandmates. Initially hesitant to perform Beatles songs during his Wings tours, McCartney eventually relaxed his policy and integrated classic tunes into his setlist. Despite his initial reticence, McCartney has now embraced performing Beatles songs in his live shows, including tracks like 'A Hard Day's Night' and 'Being for the Benefit of Mr. Kite!' that he previously considered too challenging. At his recent concert in Los Angeles, McCartney included 'Being for the Benefit of Mr. Kite!' in his setlist, showcasing his willingness to tackle even the most complex Beatles songs live.
Source: https://faroutmagazine.co.uk/beatles-song-paul-mccartney-was-afraid-to-perform-live/