imo, it's because there is so much centralisation, diictats from Westminster and not a healthy relationship between national and regional / local government
So in a crisis, they are tending to clash, especially when central government does not inspire confidence
We're not seeing party politics in Germany over this
(regional willy-wagging sometimes another thing !)
I think it's because the 16 German states are devolved with genuine autonomy:
their own Parliament etc, with responsibility and budget for public health, health srvices, environment, education etc
Merkel can make general public health rules for the whole country - but only if she discusses them first with the 16 leaders and gets unanimous consent
Responsibility and power are clear
The 401 administrative districts within the 16 states also have quite a bit of autonomy to interpret the state and national rules
So, by the time rules are applied at the most local level, there have been 3 levels of discussion and 2-3 parties involved