[banannaise]

Mental health is health. Negative mental health impacts are particularly significant when your job is to perform mental labor.

It's not defiance, it's reality: if you drag down my motivation, that's going to drag down my productivity. I don't really have much active control over that.

[StefanBatory]

But that's the point, employer doesn't care why you're sick, only that you are. You create "problems", you will get replaced.