Personal experience, but it's also been born out by studies:

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.

This seems like a pretty big stretch. The realization that mixed emotions (as in happy/angry) being useful for creative thought somehow can be applied here?