There is a continuum between a human who has heard a lifetime of music and later wrote similar but different music inspired by what they have heard, and a copy

There is a continuum between a human who has heard a lifetime of music and later wrote similar but different music inspired by what they have heard, and a copy machine that directly reproduces (with minor degradation) a copywritten work. The question is where on that spectrum does current AI training lie, and where is the cutoff between fair-use and unauthorized commercial use of copywritten works. Today's AIs are not the same as a human creating original work. Even humans have to be careful to not reproduce existing works too closely or they also get blamed for plagiarism.