Classical musicians often get the rep of just being imitators, that they cannot improvise or write their own music. All they do is perform the music in front of them.
It’s a question of poesis, Ancient Greek for “creation”, and mimesis, Ancient Greek for “imitation”. Classical musicians, then, are argued as having tons of mimesis with little poesis
This isn’t something exclusive to classical musicians either. All musicians have to balance poesis and mimesis.
And it’s a balancing act that’s nobody is ever finished with.