I think the statement was more about the impact, which will depend on each person's subjective experience
Personally I agree. Even if AI could produce identical work, the impact would be lessened. Art is more meaningful when you know it took time and was an expression/interpretation by another human (rather than a pattern prediction algorithm Frankenstein-ing existing work together). Combine that with the volume of AI content that's produced, and the impact of any particular song/art piece is even more limited.