Why do you think that creativity requires emotional engagement? I haven't found that to be the case.
https://www.psychologytoday.com/us/blog/creativity-the-art-a...
https://hbr.org/2015/08/the-emotions-that-make-us-more-creat...
https://www.frontiersin.org/articles/10.3389/fpsyg.2018.0266...
TL;DR: It's not the specific emotion that matters (indeed, there's evidence that having mixed emotions, where you can synthesize aspects of them, is crucial to creativity), it's the motivational intensity behind it.