These averages are insane!

The reported average of 20 days is likely skewed by a small number of long leaves and I suspect* is nowhere near typical for the median worker (it's nearly taking a day off every two weeks).

Longer leave already requires a doctor's approval so the proposal to require that for all leave is unlikely to change much other than drown doctors in more busy work.

*I can't find much for the 'median' amount of leave taken per year.

I wonder if lost productivity from sick leave days is offset by preserved productivity of all coworkers that were not infected by people that felt obliged to show up sick with flu or other communicable disease.

It's a joke. You can use even doctolib to get a 10 mins video call with a doctor. Say you have an unusually strong headache, and you get your 3 days leave.