I think more so the precedent it set. Not switching on ~and~ not growing nuclear. It wouldn't be too ridiculous for Germany to be producing 30GW from nuclear by now. That's a 22GW spread from what it is today which isn't negligible.
But yeah, people are definitely being a little over dramatic on the severity.
https://www.cleanenergywire.org/sites/default/files/styles/g...
The amount of flak that purple sliver garners is way disproportionate to its importance - especially since it's not even dispatchable.
Plus germany relies on natgas for a ton more than just electricity. Will we make fertilizer with nuclear power too?