It’s stress hormones you use to handle stress with becoming an emotional wreck. This includes physical stress like getting sick but also of course emotional stress.
The effects of low cortisol are similar to a burnout and high cortisol makes you worry and restless on the low end and paranoid at the high end.
Corticosteroids are synthetic versions of this and often use to treat infections and inflammation.
I print warhammer for friends for money. So that plus the money I saved on models for myself, I’d say it’s worth it.
But it’s also a hobby, learning how the things work and how to model is a lot of fun!