I've noticed that AI has caused this narrative to become more popular. "Nothing is original anyway, so why bother?" That's pure cope and you know it. A deep insecurity masked as bold truthtelling.

I think you're right, the ease in which AI can do task that we previously considered unique to human creativity does force us to further rethink and acknowledge how creativity is in a large part about "remixing" prior works, although of course we've had discourse about this for at least as early as Richard Simon's 1678 "Critical History of the Old Testament", which identified it as being a remix of earlier sources [0].

[0] https://archive.org/details/hisyo00simo/page/n1/mode/2up