Merriam Webster definition = Definition of musician
: a composer, conductor, or performer of music
I'll add to this as is known throughout the music industry - one who is creative in music - playing an instrument well, arranging music, composing music.
You said he's not a good musician yet you posted a list of guitarists as a standard for being a musician. Was Liberace a good musician or a bad musician because
he only played the piano?
As it stands, Springsteen has written some very fine tunes and lyrics - songs that are known the world over and have been played and reinterpreted by other
musicians across the globe. Songs that became anthems for a generation and will continue to be enjoyed for decades to come. So, tell us again how he's not
a good musician.
Link: https://www.merriam-webster.com/dictionary/musician