Would you say that the chess players became "purposeless" with Deep Blue, or Go players with Alpha Go?
So for some, yes. It is of course also true that many people derive self-worth and fulfillment from contributing positively to the world, and AI automating the productive work in which they specialize can undermine that.
[1] https://en.yna.co.kr/view/AEN20191127004800315
[2] https://www.nytimes.com/2024/07/10/world/asia/lee-saedol-go-...
What I am saying is that (1) I regard this as an unhealthy relationship to creativity (and I accept that this is subjective), and (2) that most people do not feel that way, as can be confirmed by the fact that chess, go, and live music performances are all still very much practiced.