Because it's EU's beigest economy and saw the biggest economic drop in the block due to its poor political decisions on over-reliance on cheap Russian gas and cheap labor to maintain competitive exports.
It's not some conspiracy, but genuine concern that if EU's richest country is struggling, the rest of the EU members will bear some of the fallout too.
Whether we like it or not Germany has always been the benchmark in Europe. If the Danish or Austrian economy would drop by 0.5% probably nobody would care, but if the EU's richest members like Germany and France were to do that then it's more concerning for everyone. That's why Germany pops up a lot because it's a very important member of the block.