Except Germany is a manufacturing- and export-based economy. Take that away, and you have a recipe for economic collapse.
Read the FT's article, which includes much more statements from politicians and economists. https://www.ft.com/content/6f325773-bf8a-4e28-9fc1-6bc986ee9... Use the Bypass Paywalls Clean extension if you need to.
Or, read what Stratfor (if you have a subscription) has been predicting for a decade now: Germany's slow decline, to be replaced as Europe's power center by Poland.
Germany was already facing a worker shortage and inflation. Now the government is discussing rationing gas allocated to German businesses. Beyond the ideological arguments, it's clear that this is going to be a crisis for Germany, and for all Eurozone economies; and their reactions will determine "how bad it gets". We are looking at a probable recession across Europe.
By the way, I warned months ago that sanctions against Russia would have a backfire effect: Russia is mostly unscathed, their oil and gas revenues are soaring; meanwhile Germany is talking about rationing. Sanctions don't work in an interconnected economy.