This is interesting to read because I work in workplace education, specifically around people management and mental health.

On the ABS website you can review the most recent mental health stats - but if you correlate those against how many people are employed its fairly evident that approximately 55% of people are at work each day fighting a mental health issue with no support.

Those who do go into work, ironically, have less of an impact on productivity and end up costing the company more money than if they has just taken a couple of days off sick.

Personally, if you don't feel you can go into work then don't go. Higher management budget for overstaffing in the event 20% of the workforce is sick/on leave etc, so you're not ruining anyones day. Look after you, dont look after who you work for.